Power supply system, method and device of high-voltage power supply, electronic equipment and storage medium

Abstract

The invention discloses a power supply system, method and device of a high-voltage power supply, electronic equipment and a storage medium. The system comprises a load circuit which is connected with a switching power supply chip of a power supply system and is used for controlling the switching power supply chip to output target voltage; the power supply circuit is connected with the load circuit and is used for supplying power to the switching power supply chip according to the target voltage; the protection circuit is connected between the power supply circuit and the switching power supply chip and is used for performing overvoltage protection on the switching power supply chip after power supply so as to enable the power supply system to be in a normal operation state; the feedback circuit is connected between the protection circuit and the switching power supply chip and used for providing feedback information for the switching power supply chip after power supply, and the feedback information is used for adjusting the initial voltage of the switching power supply chip. The technical problem that power cannot be supplied to the high-voltage equipment is solved.

Description

Technical Field

[0001] The present invention relates to the field of power supply technology, and in particular to a power supply system, method, device, electronic equipment and storage medium for a high-voltage power supply. Background Art

[0002] With technological advancements in the automotive industry, especially the popularization of new energy vehicles, the requirements for power supply systems have become more stringent. Not only is high-efficiency voltage conversion required, but the functional safety of the power supply must also be considered to ensure that the vehicle can stop safely and avoid accidents when a partial power failure occurs.

[0003] In traditional circuit design, the use of high-voltage switching power supply chips is key to building high-voltage power supply systems. However, the market supply of these chips is limited, especially for automotive-grade high-voltage switching power supply chips. Not only are the variety and quantity of these chips insufficient, but they are also primarily imported, leading to technical problems such as an inability to power high-voltage equipment.

[0004] Currently, no effective solution has been proposed to the above-mentioned technical problem of being unable to power high-voltage equipment. Summary of the Invention

[0005] Embodiments of the present invention provide a power supply system, method, device, electronic device, and storage medium for a high-voltage power supply, which at least solve the technical problem of being unable to power high-voltage equipment.

[0006] According to one aspect of an embodiment of the invention, a high-voltage power supply system is provided. The system may include: a load circuit connected to a switching power supply chip of the power supply system, configured to control the switching power supply chip to output a target voltage; a power circuit connected to the load circuit, configured to supply power to the switching power supply chip according to the target voltage; a protection circuit connected between the power circuit and the switching power supply chip, configured to provide overvoltage protection to the switching power supply chip after powering on, thereby ensuring normal operation of the power supply system; and a feedback circuit connected between the protection circuit and the switching power supply chip, configured to provide feedback information to the switching power supply chip after powering on, wherein the feedback information is used to adjust the initial voltage of the switching power supply chip.

[0007] Optionally, the power supply circuit includes: a voltage divider circuit connected to the protection circuit, used to divide the voltage flowing to the protection circuit; a first resistor connected to the voltage divider circuit; and a voltage stabilizing circuit connected between the load circuit and the first resistor, used to control the voltage in the voltage divider circuit.

[0008] Optionally, the voltage divider circuit includes: a second resistor, a third resistor, a first transistor, a first voltage regulator, and a first capacitor and a second transistor, wherein the first voltage regulator is connected between the first resistor and the first transistor, the first transistor is connected to the first capacitor, the third resistor is connected to the second resistor, and the second resistor is connected between the first capacitor and the second transistor, the first transistor is used to control the current in the power supply circuit, the first voltage regulator is used to control the current to be less than or equal to a preset current, the first capacitor is used to protect the power supply circuit, and the second transistor is used to control the power supply circuit to be in normal operating state.

[0009] Optionally, the protection circuit includes: a second voltage regulator, a fourth resistor, a fifth resistor, a third transistor, a fourth transistor, a third voltage regulator and a second capacitor, wherein the second capacitor is connected between the power supply circuit and the third voltage regulator, the fourth transistor is connected between the third voltage regulator and the third transistor, the third transistor is connected to the fourth resistor, the fourth resistor is connected between the fifth resistor and the second voltage regulator, the second voltage regulator is connected to the feedback circuit, the second voltage regulator is used to control the target voltage to be less than or equal to a preset voltage, the third transistor is used to respond to an overvoltage signal from the second voltage regulator, the fourth transistor is used to power the power supply chip, the third voltage regulator is used to control the pin voltage of the power supply chip to be less than or equal to the preset pin voltage, and the second capacitor is used to eliminate noise in the target voltage.

[0010] Optionally, the feedback circuit includes: a sixth resistor and a seventh resistor, wherein the sixth resistor is connected between the protection circuit and the switching power supply chip, and the seventh resistor is connected between the switching power supply chips.

[0011] According to one aspect of an embodiment of the present invention, a power supply method for a high-voltage power supply is provided, which can be applied to a power supply system, including: obtaining an initial voltage of a switching power supply chip in the power supply system, and feedback information of a feedback circuit in the power supply system, wherein the feedback information is used to adjust the initial voltage of the switching power supply chip; based on the feedback information, adjusting the initial voltage to obtain an adjustment result and a target voltage of the switching power supply chip; obtaining a working state of a load circuit in the power supply system, and powering the switching power supply chip based on the working state of the load circuit, the adjustment result and the target voltage.

[0012] Optionally, the switching power supply chip is powered based on the working state of the load circuit, the adjustment result and the target voltage, including: in response to the working state of the load circuit being an abnormal working state, and the adjustment result being that the target voltage is the same as the preset voltage of the switching power supply chip, the switching power supply chip is powered based on the target voltage.

[0013] According to one aspect of an embodiment of the present invention, a power supply device for a high-voltage power supply is provided, which includes: an acquisition unit, used to obtain the initial voltage of a switching power supply chip in a power supply system, and feedback information of a feedback circuit in the power supply system; an adjustment unit, used to adjust the initial voltage based on the feedback information to obtain an adjustment result and a target voltage of the switching power supply chip; and a power supply unit, used to obtain the working state of a load circuit in the power supply system, and supply power to the switching power supply chip based on the working state of the load circuit, the adjustment result and the target voltage.

[0014] According to another aspect of an embodiment of the present invention, an electronic device is provided, including: a memory storing an executable program; and a processor for running the program, wherein the program executes the methods of various embodiments of the present invention when running.

[0015] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided. The computer-readable storage medium includes a stored executable program, wherein when the executable program is running, the device where the computer-readable storage medium is located is controlled to execute the methods in various embodiments of the present invention.

[0016] According to another aspect of an embodiment of the present invention, a computer program product is provided, including a computer program. When the computer program is executed by a processor, the method in each embodiment of the present invention is implemented.

[0017] According to another aspect of an embodiment of the present invention, a computer program product is provided, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method in each embodiment of the present invention is implemented.

[0018] According to another aspect of the embodiments of the present invention, a computer program is provided. When the computer program is executed by a processor, the methods in various embodiments of the present invention are implemented.

[0019] According to another aspect of the embodiments of the present invention, a vehicle is provided. When the vehicle is executed, the method according to each embodiment of the present invention is implemented.

[0020] In an embodiment of the present invention, a load circuit is connected to a switching power supply chip of a power supply system and is used to control the switching power supply chip to output a target voltage; a power supply circuit is connected to the load circuit and is used to supply power to the switching power supply chip according to the target voltage; a protection circuit is connected between the power supply circuit and the switching power supply chip and is used to provide overvoltage protection for the switching power supply chip after power supply, so that the power supply system is in a normal operating state; a feedback circuit is connected between the protection circuit and the switching power supply chip and is used to provide feedback information to the switching power supply chip after power supply, wherein the feedback information is used to adjust the initial voltage of the switching power supply chip. That is to say, the power supply system of the high-voltage power supply in the embodiment of the present invention includes: a load circuit, a power circuit, a protection circuit and a feedback circuit, wherein the load circuit can be connected to the switching power supply chip to realize the control of the target power output by the switching power supply chip, the power circuit can be connected to the load circuit to power the switching voltage chip according to the target voltage obtained above, the protection circuit can be connected between the power circuit and the switching power supply chip to perform overvoltage protection for the switching power supply chip after power supply, so that the power supply system at this time can be in normal operating state, the feedback circuit can be connected between the protection circuit and the switching power supply chip to provide feedback information to the switching power supply chip, realize effective adjustment of the output power of the switching power supply chip, improve the safety of the use of the switching power supply chip, thereby solving the technical problem of being unable to power high-voltage equipment and achieving the technical effect of being able to power high-voltage equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0022] Figure 1 is a schematic diagram of a power supply system of a high-voltage power supply according to an embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of another high-voltage power supply system according to an embodiment of the present invention;

[0024] Figure 3 is a flow chart of a power supply method of a high-voltage power supply according to an embodiment of the present invention;

[0025] Figure 4 FIG. 1 is a schematic diagram of a power supply device of a high-voltage power supply according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] According to an embodiment of the present invention, a power supply system of a high-voltage power supply is provided. It should be noted that in the flowcharts in the accompanying drawings, the steps shown therein can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0029] The power supply system of the high-voltage power supply according to the embodiment of the present invention is introduced below.

[0030] Figure 1 FIG. 1 is a schematic diagram of a power supply system of a high voltage power supply according to an embodiment of the present invention. Figure 1 As shown, the power supply system 100 of the high-voltage power supply may include: a load circuit 101 , a power circuit 102 , a protection circuit 103 , a feedback circuit 104 and a switching power supply chip 105 .

[0031] The load circuit 101 is connected to the switching power supply chip 105 of the power supply system and is used to control the switching power supply chip to output a target voltage.

[0032] The power supply circuit 102 is connected to the load circuit and is used to supply power to the switching power supply chip according to the target voltage.

[0033] The protection circuit 103 is connected between the power supply circuit and the switching power supply chip, and is used to provide overvoltage protection for the switching power supply chip after power supply, so as to keep the power supply system in normal operation.

[0034] The feedback circuit 104 is connected between the protection circuit and the switching power supply chip, and is used to provide feedback information to the switching power supply chip after power is supplied, wherein the feedback information is used to adjust the initial voltage of the switching power supply chip.

[0035] Optionally, the switching power supply chip can be represented by U1, including a first pin, a second pin, a third pin, and a fourth pin. Among them, the first pin can be called a bias pin (BIAS pin), which is used to provide a bias voltage or current to stabilize the working state of the device. The second pin can be a drive voltage pin (DRV pin), which is used to provide the drive voltage required by the chip to ensure that the chip can work normally. The third pin can be a chip select pin (CS pin), which is used to select a specific device for communication when multiple devices share the same communication bus. The fourth pin can be a feedback pin (FB pin), which is used to input a feedback signal in the circuit to help regulate and stabilize the output.

[0036] Alternatively, the load circuit may be determined by interconnecting a plurality of devices. Figure 2 is a schematic diagram of another high-voltage power supply system according to an embodiment of the present invention, such as Figure 2 As shown, the load circuit 101 may include: twelve energy storage capacitors, five resistors, and three transistors, wherein the twelve energy storage capacitors may be represented by C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, and C14, respectively; the five resistors may be represented by R15, R16, R17, R18, and R19, respectively; the three transistors may be represented by D1, Q3, and D2, D1 may be a secondary rectifier diode, Q3 may be a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), and D2 may be a diode.

[0037] Further, if Figure 2As shown, GND is used to represent high voltage to ground, HV is used to represent high voltage input, and the energy storage capacitor is composed of C1, C2, C3, C4, C5, C6, C7 and C8. The energy storage capacitors are connected in series in pairs to meet the circuit voltage resistance requirement. After the series connection, the four groups are connected in parallel, one end is connected to HV, and the other end is connected to the high voltage ground GND. R15, R16, and one end of C9 are connected to the primary winding of the transformer and HV, and the other end is connected to the cathode of D2. The anode of D2 is connected to the drain of Q3 and the other pin of the primary winding of the transformer. From the above, it can be seen that D2, R15, R16, and C9 constitute a resistor-capacitor-diode (RCD) absorption circuit to prevent Q3 from breaking down due to excessive reverse peak voltage. One end of R19 can be connected to the DRV pin of the switching power supply chip U1, and the other end is connected to the gate of Q3. R19 can be a gate drive resistor. R17 and R18 are both current limiting resistors. One end is connected to the source of Q3 and the CS pin of the switching power supply chip U1, and the other end is connected to GND. C14 can be a filter capacitor, connected in parallel across resistors R17 and R18. C10 and C11 can both be energy storage capacitors. The anode of D1 is connected to one end of the transformer output winding, and the cathode is connected to one end of C10 and C11. The output voltage at this time can be represented by VOUT, for example, 15 volts (V). The other ends of C10 and C11 are connected to GND.

[0038] Optionally, the target voltage of the switching power supply chip can be obtained through the load circuit, and the switching voltage chip can be powered by the power supply circuit according to the target voltage, wherein the power supply circuit can be called a current source circuit, referred to as a current source for short.

[0039] Optionally, the protection circuit is connected to the switching power supply chip through the BIAS pin, and is connected to the power supply circuit through a transistor in the power supply circuit, so as to achieve the purpose of overvoltage protection for the switching power supply chip after power supply, so that the power supply system can work normally at this time.

[0040] Optionally, the feedback circuit may be referred to as a feedback voltage circuit, and the feedback information may be referred to as feedback voltage information. The output voltage of the switching voltage chip is adjusted by the feedback voltage information so that the voltage of the switching voltage chip is within a normal range.

[0041] In an embodiment of the present invention, a power supply system of a high-voltage power supply includes: a load circuit, a power circuit, a protection circuit and a feedback circuit, wherein the load circuit can be connected to a switching power supply chip to control the target power output by the switching power supply chip, the power circuit can be connected to the load circuit to power the switching voltage chip according to the target voltage obtained above, the protection circuit can be connected between the power circuit and the switching power supply chip to provide overvoltage protection for the switching power supply chip after power supply, so that the power supply system at this time can be in a normal operating state, the feedback circuit can be connected between the protection circuit and the switching power supply chip to provide feedback information to the switching power supply chip, effectively adjust the output power of the switching power supply chip, and improve the safety of the switching power supply chip, thereby solving the technical problem of being unable to power high-voltage equipment and achieving the technical effect of being able to power high-voltage equipment.

[0042] The above system of this embodiment is further introduced below.

[0043] As an optional embodiment, the power supply circuit includes: a voltage divider circuit, connected to the protection circuit, for dividing the voltage flowing to the protection circuit; a first resistor, connected to the voltage divider circuit; and a voltage stabilizing circuit, connected between the load circuit and the first resistor, for controlling the voltage in the voltage divider circuit.

[0044] In this embodiment, the power supply circuit includes: a voltage divider circuit, a first resistor and a voltage stabilizing circuit, wherein the first resistor can be represented by R8, and the voltage stabilizing circuit can be formed by connecting multiple resistors and a voltage stabilizing diode in series, wherein the multiple resistors can be represented by R1, R2, R3, R4, R5, R6, and R7 respectively, and the voltage stabilizing diode can be represented by Z1.

[0045] For example, if Figure 2 As shown, R1, R2, R3, R4, R5, R6, and R7 are connected in series with the voltage regulator Z1 (15V) to form a voltage regulator circuit to prevent overvoltage on the gate of Q1. It should be noted that this is only an example of the configuration of the voltage regulator circuit and does not specifically limit the configuration of the voltage regulator circuit.

[0046] As an optional embodiment, the voltage divider circuit includes: a second resistor, a third resistor, a first transistor, a first voltage regulator, and a first capacitor and a second transistor, wherein the first voltage regulator is connected between the first resistor and the first transistor, the first transistor is connected to the first capacitor, the third resistor is connected to the second resistor, and the second resistor is connected between the first capacitor and the second transistor. The first transistor is used to control the current in the power supply circuit, the first voltage regulator is used to control the current to be less than or equal to a preset current, the first capacitor is used to protect the power supply circuit, and the second transistor is used to control the power supply circuit to be in normal operating state.

[0047] In this embodiment, the voltage divider circuit may include: a second resistor, a third resistor, a first transistor, a first voltage regulator, a first capacitor and a second transistor, wherein the second resistor can be represented by R13, the third resistor can be represented by R14, the first transistor can be represented by Q1, the first voltage regulator can be an adjustable voltage regulator (TL431), which can be represented by U2, the first capacitor can be represented by C12, which can be a gate filter capacitor, and the second transistor can be represented by D4.

[0048] Alternatively, in the voltage divider circuit, Q1 can be a high-voltage, high-power metal-oxide semiconductor field-effect transistor (MOSFET). Its drain-source (DS) terminals are used to carry excess high voltage. By controlling its gate voltage, the impedance across DS can be adjusted, thereby controlling the current flowing through the current source. Under normal operating conditions, Q1's impedance is low, allowing current to flow. When short-circuit protection is activated, Q1's impedance increases significantly, limiting the current passing through and protecting the circuit from damage caused by overload or short circuit.

[0049] Alternatively, the TL431 is a precision adjustable reference. By setting resistors R13 and R14 connected to the TL431, the current output from the current source circuit can be precisely adjusted to ensure it meets the startup requirements of the low-voltage switching power supply chip. Furthermore, through its internal feedback mechanism, the TL431 automatically adjusts the gate voltage of MOSFET Q1 based on current changes across DS, thereby controlling the impedance across DS to maintain a stable current output. This ensures that the current does not exceed a predetermined safety range even in the event of input voltage fluctuations or a short circuit.

[0050] Optionally, gate filter capacitor C12 is used to eliminate transients and noise in the gate voltage of MOSFET Q1, ensuring the stability and accuracy of Q1's gate voltage. Filter capacitor C12, connected between Q1's gate and the REF terminal of the TL431, helps prevent rapid fluctuations in the gate voltage from adversely affecting Q1's control, ensuring the stability of the current source circuit and the reliability of Q1's switching action.

[0051] Optionally, D4 can be a freewheeling diode, used to protect the current in the current source circuit. When the current source is off, D4 prevents any residual charge between the gate and source of Q1 from flowing back through R13 and R14, thereby preventing a sudden increase in the gate voltage of Q1 after the current source is turned off, causing Q1 to accidentally turn on. D4 also ensures that any charge on the gate of Q1 can be quickly and safely discharged when the current source is turned off, facilitating stable operation and protection of the circuit.

[0052] Further, freewheeling diodes, also known as freewheeling diodes or reverse diodes, are primarily used in circuits to protect switching components and suppress voltage spikes caused by inductive loads. Their functions include protecting switching components, reducing electromagnetic interference, and maintaining current continuity.

[0053] For example, after obtaining the voltage stabilization circuit, the gate overvoltage of Q1 can be avoided. Figure 2 As shown, the junction of R7 and Z1 is connected to one end of R8, the other end of R8 is connected to the gate of Q1, one end of C12 is connected to the gate of Q1, and one end is connected to the REF terminal of U2 (TL431). R13 and R14 are feedback adjustment resistors, one end is connected to the source of Q1 and the reference signal pin (REF) of U2 (TL431), and the other end is connected to the anode terminal of U2 (TL431). The entire dotted box in the figure is the current source. As can be seen from the above, the core of the voltage divider circuit is U2 TL431 and Q1 MOSFET. By setting the resistance value of the parallel resistors R13 and R14, the purpose of voltage division of the circuit is achieved.

[0054] It's important to note that the voltage regulator circuit provides a protection mechanism, ensuring that the gate voltage of MOSFET Q1 remains within a preset safety threshold under all operating conditions. This is crucial in high-voltage switching power supply design because it directly affects the circuit's reliability, safety, and the lifespan of the MOSFET itself. In this way, the voltage regulator circuit ensures that the current source circuit can operate safely and reliably, preventing damage to Q1 or other related components due to excessive gate voltage even in the event of a high-voltage input or system anomaly.

[0055] Furthermore, the circuit requires a current source of 1 milliampere (mA). Since the voltage between the REF terminal and the anode of U2 (TL431) is 2.5V, 2.5V / 1mA = 2500 ohms (Ω). By setting the resistance value of R13 and R14 in parallel to 2500Ω, a 1mA current source can be obtained, and the remaining voltage will be applied to MOSFET Q1.

[0056] It should be noted that the connection method between the voltage divider circuit and the protection circuit is: the lower end of R13 is connected to the anode of the diode D4, the cathode of D4 is connected to one end of C13, and the cathode of the voltage regulator Z2 (15V) is connected to the BIAS pin of the switching power supply chip U1. Among them, Z2 can be a protection voltage regulator, which can be used to prevent the BIAS pin of the switching power supply chip U1 from being damaged due to overvoltage conditions. C13 can be an energy storage capacitor, which can provide energy for U1 to work normally. The other ends of Z2 and C13 are connected to GND.

[0057] As an optional embodiment, the protection circuit includes: a second voltage regulator, a fourth resistor, a fifth resistor, a third transistor, a fourth transistor, a third voltage regulator and a second capacitor, wherein the second capacitor is connected between the power supply circuit and the third voltage regulator, the fourth transistor is connected between the third voltage regulator and the third transistor, the third transistor is connected to the fourth resistor, the fourth resistor is connected between the fifth resistor and the second voltage regulator, the second voltage regulator is connected to the feedback circuit, the second voltage regulator is used to control the target voltage to be less than or equal to the preset voltage, the third transistor is used to respond to the overvoltage signal issued by the second voltage regulator, the fourth transistor is used to power the power chip, the third voltage regulator is used to control the pin voltage of the power chip to be less than or equal to the preset pin voltage, and the second capacitor is used to eliminate noise in the target voltage.

[0058] In this embodiment, the protection circuit may include: a second voltage regulator, a fourth resistor, a fifth resistor, a third transistor, a fourth transistor, a third voltage regulator and a second capacitor, wherein the second voltage regulator can be represented by Z3, the fourth resistor can be represented by R11, the fifth resistor can be represented by R12, the third transistor can be represented by Q2, the fourth transistor can be represented by D3, the third voltage regulator can be represented by Z2, and the second capacitor can be represented by C13.

[0059] Optionally, Z3 can serve as a key voltage regulator for overvoltage protection and feedback control. When the output voltage VOUT exceeds a preset threshold (e.g., 12V), Z3 breaks down and conducts, pulling the voltage down. This, in turn, controls the current source's shutdown by changing Q2's collector impedance, protecting subsequent circuits from overvoltage damage. Z3's position and operating mode in the circuit make it a voltage monitoring and protection mechanism, ensuring that the switching power supply's output voltage remains within a safe range.

[0060] Optionally, Q2 in this circuit is an NPN transistor that can serve as part of the overvoltage protection circuit. When Z3 breaks down, Q2's collector impedance rapidly decreases, pulling down Q1's gate voltage and shutting down the current source. R11 limits the current at Q2's base, and its emitter is grounded. In this way, Q2 responds to Z3's overvoltage signal, turning the current source on and off, ensuring automatic system protection in overvoltage conditions and preventing damage.

[0061] Optionally, D3 can be a feedback diode that shuts down the current source after the power supply system stabilizes, providing power to U1's BIAS pin. Once VOUT is established and stable, D3 allows VOUT to directly power U1, disabling the current source. This current source only provides a stable current during startup or when VOUT is short-circuited. During normal operation, it is powered by the output voltage VOUT, improving power supply system efficiency and simplifying circuit design.

[0062] Optionally, Z2 can be a voltage regulator that provides overvoltage protection for the BIAS pin of switching power supply chip U1. This ensures that the voltage on U1's BIAS pin never exceeds a safe threshold, protecting U1 from damage even if the current source or other system components malfunction. Z2's voltage regulation ensures a safe power supply for U1.

[0063] Optionally, C13 can be a filter capacitor used to eliminate high-frequency noise in the output voltage VOUT, smoothing the voltage waveform and ensuring a clean, stable power supply for U1. Once the power supply system is functioning properly, C13 provides energy support for the stable operation of U1, ensuring its proper functioning under various operating conditions, thereby improving the overall reliability and performance of the power supply system.

[0064] For example, D3's anode is connected to VOUT, and its cathode is connected to U1's BIAS pin. When the power supply system is operating normally, the current source is turned off, and U1 is powered by VOUT through D3. Zener diode Z3 (12V) has its cathode connected to VOUT, its other end connected to one end of R11 and R12. The other end of R12 is connected to GND, and the other end of R11 is connected to the base of transistor Q2 (e.g., an NPN transistor). R11 can be a current-limiting resistor for Q2's base, and R12 can be a pull-down resistor for Q2. The emitter of Q2 is connected to GND. If VOUT exceeds 12V, Z3 will break down, rapidly reducing Q2's collector impedance and pulling down Q1's gate voltage, thereby shutting down the current source. Therefore, when the entire system starts up, VOUT is 0V, and the current source is used to power the switching power supply chip. As the VOUT voltage gradually rises and breaks down Z3, the current source is turned off, and the switching power supply chip can now be powered by VOUT.

[0065] As an optional embodiment, the feedback circuit includes: a sixth resistor and a seventh resistor, wherein the sixth resistor is connected between the protection circuit and the switching power supply chip, and the seventh resistor is connected between the switching power supply chips.

[0066] In this embodiment, the feedback circuit includes: a sixth resistor and a seventh resistor, wherein the sixth resistor can be represented by R9 and the seventh resistor can be represented by R10.

[0067] For example, if Figure 2 As shown, R9 and R10 form a feedback voltage circuit. The upper end of R9 is connected to VOUT, and the lower end is connected to the upper end of R10 and the FB pin of U1. The lower end of R10 is connected to GND. It outputs a stable voltage for the switching power supply chip and provides relevant feedback information.

[0068] It should be noted that in this embodiment of the present invention, the core of the current source circuit is a TL431 (adjustable voltage regulator) coupled with an N-channel enhancement-mode MOSFET. Z1 is a 15V voltage regulator diode, primarily used for voltage regulation to protect the MOSFET gate from damage due to overvoltage. When the TL431 is operating normally, the voltage between pin REF and the anode pin (Anode pin) is 2.5V. The current flowing through MOSFET DS can be adjusted by adjusting the resistance of the resistor connected in parallel between the TL431 pins REF and Anode pins, i.e., i = 2.5 / (R13 / / R14). This current is designed to meet the required startup current of the low-voltage switching power supply chip. The TL431 feedback controls the gate of Q1, thereby controlling the impedance across Q1 DS, so that excess high voltage is borne by Q1. The startup current of a typical low-voltage switching power supply is less than 1 to 2 mA. Even in a short-circuit condition, Q1 can use a large-package MOSFET to meet heat dissipation requirements. In the event of a load short circuit, the current source position only provides a stable operating current to the power supply pin of the switching power supply chip U1. If the current exceeds the demand, voltage regulation protection can be achieved through the voltage regulator Z2. After the short circuit is removed, the system can automatically recover, avoiding other designs in the event of a short circuit, where Q1 cannot be turned off and causes damage to Q1 and U1.

[0069] In an embodiment of the present invention, a power supply system of a high-voltage power supply includes: a load circuit, a power circuit, a protection circuit and a feedback circuit, wherein the load circuit can be connected to a switching power supply chip to control the target power output by the switching power supply chip, the power circuit can be connected to the load circuit to power the switching voltage chip according to the target voltage obtained above, the protection circuit can be connected between the power circuit and the switching power supply chip to provide overvoltage protection for the switching power supply chip after power supply, so that the power supply system at this time can be in a normal operating state, the feedback circuit can be connected between the protection circuit and the switching power supply chip to provide feedback information to the switching power supply chip, effectively adjust the output power of the switching power supply chip, and improve the safety of the switching power supply chip, thereby solving the technical problem of being unable to power high-voltage equipment and achieving the technical effect of being able to power high-voltage equipment.

[0070] The following describes a power supply method for a high-voltage power supply according to an embodiment of the present invention.

[0071] Figure 3FIG. 1 is a flow chart of a method for supplying power to a high-voltage power supply according to an embodiment of the present invention. Figure 3 As shown, the method may include the following steps:

[0072] Step S301: obtaining the initial voltage of the switching power supply chip in the power supply system and feedback information of the feedback circuit in the power supply system.

[0073] In the technical solution provided in step S301 of the present invention, the initial voltage of the switching power supply chip and feedback information from the feedback circuit are obtained. The initial voltage can be measured using an oscilloscope and is used to represent the voltage of the switching power supply chip at startup, for example, 12V. The feedback information is used to adjust the initial voltage of the switching power supply chip.

[0074] It should be noted that the measurement method of the initial voltage is only illustrated here, and the measurement method of the initial voltage is not specifically limited.

[0075] Step S302: Based on the feedback information, the initial voltage is adjusted to obtain an adjustment result and a target voltage of the switching power supply chip.

[0076] In the technical solution provided in step S302 of the present invention, after obtaining the feedback information, the initial voltage can be adjusted based on the feedback information to obtain the adjustment result and target voltage of the switching voltage chip. The adjustment result is used to indicate whether the target voltage is the same as the preset voltage of the switching power supply chip. The preset voltage can be a manually set voltage threshold.

[0077] Optionally, when the target voltage is the same as the preset voltage, it means that the target voltage at this time is within the normal range and the working state of the switching voltage chip is in a normal working state; when the target voltage is different from the preset voltage, it means that the working state of the switching voltage chip at this time is in an abnormal working state.

[0078] It can be understood that this is only a preferred implementation method for obtaining the adjustment result and target voltage of the switching power supply chip, and the process and method for obtaining the adjustment result and target voltage of the switching power supply chip are not specifically limited. As long as the initial voltage is adjusted based on feedback information, the process and method for obtaining the adjustment result and target voltage of the switching power supply chip are within the scope of protection of the present invention and will not be repeated here.

[0079] Step S303 , obtaining the working state of the load circuit in the power supply system, and supplying power to the switching power supply chip based on the working state of the load circuit, the adjustment result and the target voltage.

[0080] In the technical solution provided in step S303 of the present invention, it is necessary to obtain the operating state of the load circuit in the power supply system, and then adjust the result and the target voltage based on the operating state of the load circuit to realize power supply to the switching power supply chip. The operating state of the load circuit can be a normal operating state or an abnormal operating state.

[0081] Optionally, when the working state of the load circuit is a normal working state, it has no impact on other circuits, that is, when other circuits are in a normal working state, the switching power supply chip can be powered normally; when the working state of the load circuit is an abnormal working state, that is, a short circuit occurs in the load circuit, and the load circuit cannot work at this time, that is, it is necessary to remove this part of the load circuit before proceeding to the next step.

[0082] It should be noted that this is only a preferred implementation method for powering the switching power supply chip, and the process and method of powering the switching power supply chip cannot be specifically limited. As long as it is based on the working state of the load circuit, the adjustment result and the target voltage, the process and method of powering the switching power supply chip are within the scope of protection of the present invention and are not listed here.

[0083] In the above steps S301 to S303 of the present invention, the initial voltage of the switching power supply chip in the power supply system and the feedback information of the feedback circuit in the power supply system are obtained, wherein the feedback information is used to adjust the initial voltage of the switching power supply chip; based on the feedback information, the initial voltage is adjusted to obtain the adjustment result and target voltage of the switching power supply chip; the working state of the load circuit in the power supply system is obtained, and based on the working state of the load circuit, the adjustment result and the target voltage, the switching power supply chip is powered. That is, the embodiment of the present invention can first obtain the initial voltage of the switching power supply chip in the power supply system and the feedback information of the feedback circuit, and then adjust the initial voltage according to the feedback information to obtain the adjustment result and target voltage of the switching power supply chip, then obtain the working state of the load circuit in the power supply system, and finally power the switching power supply chip according to the working state of the load circuit, the adjustment result and the target voltage, thereby solving the technical problem of being unable to power high-voltage equipment and achieving the technical effect of being able to power high-voltage equipment.

[0084] As an optional embodiment, it is characterized in that the switching power supply chip is powered based on the working state of the load circuit, the adjustment result and the target voltage, including: in response to the working state of the load circuit being an abnormal working state, and the adjustment result being that the target voltage is the same as the preset voltage of the switching power supply chip, the switching power supply chip is powered based on the target voltage.

[0085] In this embodiment, when the working state of the load circuit is an abnormal working state, and the adjustment result at this time is that the target voltage is the same as the preset voltage of the switching power supply chip, the switching power supply chip can be powered according to the target voltage.

[0086] For example, when a short circuit occurs in the load circuit, it means that the load circuit is in an abnormal working state, and the short-circuited components need to be removed. At this time, if the target voltage is the same as the preset voltage of the switching power supply chip, the power supply system can still supply power to the switching power supply chip according to the target voltage.

[0087] For another example, when the output VOUT is short-circuited, VOUT cannot break through Z3, and the switching power supply chip is once again powered by the current source. Because the current source current is relatively small, around 1 to 2 mA, the excess voltage is borne by Q1. Even if the voltage is 1000V and the power of Q1 is between 1 watt (W) and 2W, as long as Q1's package is selected appropriately and the heat dissipation is sufficient, and there is a Zener diode Z2 on the U1 BIAS pin to provide overvoltage protection, the system will not be damaged. After the fault is removed, the system resumes normal operation, the current source is turned off, and the switching power supply chip is once again powered by VOUT.

[0088] In this embodiment, the initial voltage of the switching power supply chip in the power supply system and the feedback information of the feedback circuit in the power supply system are obtained, wherein the feedback information is used to adjust the initial voltage of the switching power supply chip; based on the feedback information, the initial voltage is adjusted to obtain the adjustment result and target voltage of the switching power supply chip; the working state of the load circuit in the power supply system is obtained, and based on the working state of the load circuit, the adjustment result and the target voltage, the switching power supply chip is powered. That is to say, the embodiment of the present invention can first obtain the initial voltage of the switching power supply chip in the power supply system and the feedback information of the feedback circuit, and then adjust the initial voltage according to the feedback information to obtain the adjustment result and target voltage of the switching power supply chip. Then, it is necessary to obtain the working state of the load circuit in the power supply system, and finally, according to the working state of the load circuit, the adjustment result and the target voltage, the switching power supply chip can be powered, thereby solving the technical problem of being unable to power high-voltage equipment and achieving the technical effect of being able to power high-voltage equipment.

[0089] The technical solutions of the embodiments of the present invention are described below with reference to preferred implementation methods.

[0090] Due to the complexity of automobiles, the entire industry is striving to provide components that meet functional safety requirements. Motor controllers, as core power control components, bear the brunt of this challenge. To meet the functional safety requirements of motor controllers, power supply architectures typically employ separate high- and low-voltage power supplies. This ensures that if a power failure occurs on one power line, the vehicle can be brought to a smooth stop, preventing accidents.

[0091] In traditional circuit design, the use of high-voltage switching power supply chips is key to building high-voltage power supply systems. However, the market supply of these chips is limited, especially for automotive-grade high-voltage switching power supply chips. Not only are the variety and quantity of these chips insufficient, but they are also primarily imported, leading to technical problems such as an inability to power high-voltage equipment.

[0092] Therefore, in order to solve the above problems, the present invention provides a power supply system of a high-voltage power supply, which includes: a load circuit, a power supply circuit, a protection circuit and a feedback circuit, wherein the load circuit can be connected to a switching power supply chip to control the target power output by the switching power supply chip, the power supply circuit can be connected to the load circuit to power the switching voltage chip according to the target voltage obtained above, the protection circuit can be connected between the power supply circuit and the switching power supply chip to perform overvoltage protection for the switching power supply chip after power supply, so that the power supply system at this time can be in normal operation, the feedback circuit can be connected between the protection circuit and the switching power supply chip to provide feedback information to the switching power supply chip, effectively adjust the output power of the switching power supply chip, and improve the safety of the switching power supply chip, thereby solving the technical problem of being unable to power high-voltage equipment and achieving the technical effect of being able to power high-voltage equipment.

[0093] In the embodiment of the present invention, Figure 1 As shown, the power supply system of the high-voltage power supply includes: a load circuit 101 , a power circuit 102 , a protection circuit 103 , a feedback circuit 104 and a switching power supply chip 105 .

[0094] The load circuit 101 is connected to the switching power supply chip 105 of the power supply system and is used to control the switching power supply chip to output a target voltage.

[0095] Alternatively, as Figure 2As shown, GND represents high voltage to ground, and HV represents high voltage input. Load circuit 101 is as follows: the energy storage capacitors are composed of C1, C2, C3, C4, C5, C6, C7, and C8. Two of them are connected in series to meet the circuit's withstand voltage requirements. After the series connection, the four groups are connected in parallel, with one end connected to HV and the other end to the high voltage ground GND. R15, R16, and C9 have one end connected to the transformer primary winding and HV, and the other end connected to the cathode of D2. The anode of D2 is connected to the drain of Q3, the other pin of the transformer primary winding. From the above, it can be seen that D2, R15, R16, and C9 form an RCD absorption circuit to prevent Q3 from breaking down due to excessive reverse peak voltage. One end of R19 can be connected to the DRV pin of switching power supply chip U1, and the other end to the gate of Q3. R19 can be a gate drive resistor. R17 and R18 are both current-limiting resistors. One end is connected to the source of Q3 and the CS pin of switching power supply chip U1, and the other end is connected to GND. C14 can be a filter capacitor, connected in parallel across resistors R17 and R18. C10 and C11 can both be energy storage capacitors. D1's anode is connected to one end of the transformer's output winding, and its cathode is connected to one end of C10 and C11. The output voltage at this point can be represented by VOUT, for example, 15V. The other ends of C10 and C11 are connected to GND.

[0096] The power supply circuit 102 is connected to the load circuit and is used to supply power to the switching power supply chip according to the target voltage.

[0097] Optionally, the power supply circuit includes: a voltage divider circuit connected to the protection circuit, used to divide the voltage flowing to the protection circuit; a first resistor connected to the voltage divider circuit; and a voltage stabilizing circuit connected between the load circuit and the first resistor, used to control the voltage in the voltage divider circuit.

[0098] Optionally, the voltage divider circuit includes: a second resistor, a third resistor, a first transistor, a first voltage regulator, and a first capacitor and a second transistor, wherein the first voltage regulator is connected between the first resistor and the first transistor, the first transistor is connected to the first capacitor, the third resistor is connected to the second resistor, and the second resistor is connected between the first capacitor and the second transistor, the first transistor is used to control the current in the power supply circuit, the first voltage regulator is used to control the current to be less than or equal to a preset current, the first capacitor is used to protect the power supply circuit, and the second transistor is used to control the power supply circuit to be in normal operating state.

[0099] Alternatively, as Figure 2As shown in the figure, the components and connections between them in the power supply circuit are as follows: R1, R2, R3, R4, R5, R6, and R7 are connected in series with the Zener diode Z1 (15V) to form a voltage regulator circuit to prevent overvoltage on Q1's gate. The junction of R7 and Z1 is connected to one end of R8, the other end of which is connected to Q1's gate and Q2's collector. C12 is connected to Q1's gate and the REF terminal of U2 (TL431). R13 and R14 are feedback resistors, one end connected to Q1's source and the reference signal pin (REF) of U2 (TL431), and the other end connected to the anode terminal of U2 (TL431). The entire dotted box in the figure represents the current source. As can be seen from the above, the core of the voltage divider circuit is U2's TL431 and Q1's MOSFET. The circuit's voltage is divided by setting the resistance of the parallel resistors R13 and R14.

[0100] For example, a circuit that requires a 1mA current source has a voltage of 2.5V between the REF terminal and the anode of U2 (TL431). Therefore, 2.5V / 1mA = 2500Ω. By setting the resistance of R13 and R14 in parallel to 2500Ω, a 1mA current source is obtained, and the remaining voltage is applied to MOSFET Q1.

[0101] Furthermore, the lower end of R13 is connected to the anode of diode D4, the cathode of D4 is connected to one end of C13, and the cathode of Zener diode Z2 (15V) is connected to the BIAS pin of the switching power supply chip U1. Among them, Z2 can be a protective Zener diode, which can be used to prevent the BIAS pin of the switching power supply chip U1 from being damaged due to overvoltage conditions. C13 can be an energy storage capacitor, which can provide energy for U1 to work normally. The other ends of Z2 and C13 are connected to GND.

[0102] The protection circuit 103 is connected between the power supply circuit and the switching power supply chip, and is used to provide overvoltage protection for the switching power supply chip after power supply, so as to keep the power supply system in normal operation.

[0103] Optionally, the protection circuit includes: a second voltage regulator, a fourth resistor, a fifth resistor, a third transistor, a fourth transistor, a third voltage regulator and a second capacitor, wherein the second capacitor is connected between the power supply circuit and the third voltage regulator, the fourth transistor is connected between the third voltage regulator and the third transistor, the third transistor is connected to the fourth resistor, the fourth resistor is connected between the fifth resistor and the second voltage regulator, the second voltage regulator is connected to the feedback circuit, the second voltage regulator is used to control the target voltage to be less than or equal to a preset voltage, the third transistor is used to respond to an overvoltage signal from the second voltage regulator, the fourth transistor is used to power the power supply chip, the third voltage regulator is used to control the pin voltage of the power supply chip to be less than or equal to the preset pin voltage, and the second capacitor is used to eliminate noise in the target voltage.

[0104] Optionally, D3's anode is connected to VOUT, and its cathode is connected to U1's BIAS pin. When the power supply system is operating normally, the current source is turned off, and U1 is powered by VOUT through D3. Zener diode Z3 (12V) has its cathode connected to VOUT, its other end connected to one end of R11 and R12, the other end of R12 connected to GND, and the other end of R11 connected to the base of transistor Q2 (NPN transistor). R11 can be a current-limiting resistor for Q2's base, and R12 can be a pull-down resistor for Q2. The emitter of Q2 is connected to GND. If VOUT exceeds 12V, Z3 will break down, rapidly reducing Q2's collector impedance and lowering Q1's gate voltage, shutting down the current source. Therefore, when the entire system starts up, VOUT is 0V, and the switching power supply chip is powered by the current source. As the VOUT voltage gradually rises and breaks down Z3, the current source is turned off, and the switching power supply chip can now be powered by VOUT.

[0105] The feedback circuit 104 is connected between the protection circuit and the switching power supply chip, and is used to provide feedback information to the switching power supply chip after power is supplied, wherein the feedback information is used to adjust the initial voltage of the switching power supply chip.

[0106] Optionally, the feedback circuit includes: a sixth resistor and a seventh resistor, wherein the sixth resistor is connected between the protection circuit and the switching power supply chip, and the seventh resistor is connected between the switching power supply chips.

[0107] Optionally, R9 and R10 form a feedback voltage circuit, the upper end of R9 is connected to VOUT, the lower end is connected to the upper end of R10 and the FB pin of U1, the lower end of R10 is connected to GND, and outputs a stable voltage for the switching power supply chip and provides relevant feedback information.

[0108] It should be noted that when the output VOUT is short-circuited, VOUT cannot break through Z3, and the power supply of the switching power supply chip is again provided by the current source. Because the current of the current source is relatively small, at about 1 to 2 mA, the excess voltage is borne by Q1 at this time. Even if the power of Q1 is between 1W and 2W at a voltage of 1000V, as long as the Q1 package is selected reasonably and the heat dissipation is sufficient, and there is a Zener diode Z2 on the U1 BIAS pin to provide overvoltage protection, the system will not be damaged. After the fault is removed, the system resumes normal operation, the current source is turned off, and the power supply of the switching power supply chip is provided by VOUT again.

[0109] In this embodiment of the present invention, the core of the current source circuit is a TL431 (adjustable voltage regulator) coupled with an N-channel enhancement-mode MOSFET. Z1 is a 15V voltage regulator diode, primarily used for voltage regulation and to protect the MOSFET gate from overvoltage damage. When the TL431 is operating normally, the voltage between pin REF and the anode pin (Anode pin) is 2.5V. The current flowing through MOSFET DS can be adjusted by adjusting the resistance of the resistor connected in parallel between the TL431's REF and Anode pins, i.e., i = 2.5 / (R13 / / R14). This current is designed to meet the startup current requirements of a low-voltage switching power supply chip. The TL431 feedback controls Q1's gate, thereby controlling the impedance across Q1 DS, allowing Q1 to bear the excess high voltage. Typically, the startup current of a low-voltage switching power supply is less than 1 to 2 mA. Even in a short-circuit condition, Q1 can use a large-package MOSFET to meet heat dissipation requirements. In the event of a load short circuit, the current source position only provides a stable operating current to the power supply pin of the switching power supply chip U1. If the current exceeds the demand, voltage regulation protection can be achieved through the voltage regulator Z2. After the short circuit is removed, the system can automatically recover, avoiding other designs in the event of a short circuit, where Q1 cannot be turned off and causes damage to Q1 and U1.

[0110] In this embodiment, the power supply system of the high-voltage power supply includes: a load circuit, a power circuit, a protection circuit and a feedback circuit, wherein the load circuit can be connected to the switching power supply chip to control the target power output by the switching power supply chip, the power circuit can be connected to the load circuit to power the switching voltage chip according to the target voltage obtained above, the protection circuit can be connected between the power circuit and the switching power supply chip to provide overvoltage protection for the switching power supply chip after power supply, so that the power supply system at this time can be in normal operation, the feedback circuit can be connected between the protection circuit and the switching power supply chip to provide feedback information to the switching power supply chip, effectively adjust the output power of the switching power supply chip, and improve the safety of the switching power supply chip, thereby solving the technical problem of being unable to power high-voltage equipment and achieving the technical effect of being able to power high-voltage equipment.

[0111] According to an embodiment of the present invention, a high-voltage power supply device is provided. It should be noted that the high-voltage power supply device can be used to implement a high-voltage power supply method in the embodiment.

[0112] Figure 4 FIG is a schematic diagram of a power supply device of a high voltage power supply according to an embodiment of the present invention. Figure 4 As shown, a high-voltage power supply device 400 may include: an acquisition unit 401 , a regulation unit 402 and a power supply unit 403 .

[0113] The acquisition unit 401 is configured to acquire the initial voltage of the switching power supply chip in the power supply system and feedback information of the feedback circuit in the power supply system.

[0114] The regulating unit 402 is configured to regulate the initial voltage based on the feedback information to obtain a regulation result and a target voltage of the switching power supply chip.

[0115] The power supply unit 403 is used to obtain the working status of the load circuit in the power supply system, and supply power to the switching power supply chip based on the working status of the load circuit, the adjustment result and the target voltage.

[0116] Optionally, the power supply unit 403 further includes: a power supply module for supplying power to the switching power supply chip based on the target voltage in response to the load circuit operating state being an abnormal operating state and the adjustment result being that the target voltage is the same as the preset voltage of the switching power supply chip.

[0117] In this embodiment, the initial voltage of the switching power supply chip in the power supply system and the feedback information of the feedback circuit in the power supply system are obtained by the acquisition unit; the initial voltage is adjusted based on the feedback information by the adjustment unit to obtain the adjustment result and the target voltage of the switching power supply chip; the working state of the load circuit in the power supply system is obtained by the power supply unit, and based on the working state of the load circuit, the adjustment result and the target voltage, the switching power supply chip is powered, thereby solving the technical problem of being unable to power high-voltage equipment and achieving the technical effect of being able to power high-voltage equipment.

[0118] According to an embodiment of the present invention, an electronic device is further provided, comprising: a memory storing an executable program; and a processor for running the program, wherein the program executes the methods of various embodiments of the present invention when running.

[0119] Optionally, the electronic device can also perform the following steps: obtaining the initial voltage of the switching power supply chip in the power supply system and feedback information of the feedback circuit in the power supply system, wherein the feedback information is used to adjust the initial voltage of the switching power supply chip; based on the feedback information, adjusting the initial voltage to obtain the adjustment result and target voltage of the switching power supply chip; obtaining the working status of the load circuit in the power supply system, and supplying power to the switching power supply chip based on the working status of the load circuit, the adjustment result and the target voltage.

[0120] Optionally, the electronic device can also perform the following steps: based on the working state of the load circuit, the adjustment result and the target voltage, powering the switching power supply chip, including: in response to the working state of the load circuit being an abnormal working state, and the adjustment result being that the target voltage is the same as the preset voltage of the switching power supply chip, powering the switching power supply chip based on the target voltage.

[0121] According to an embodiment of the present invention, a computer-readable storage medium is further provided. The computer-readable storage medium includes a stored executable program, wherein when the executable program is running, the device where the computer-readable storage medium is located is controlled to execute the methods in various embodiments of the present invention.

[0122] Optionally, the computer-readable storage medium can also perform the following steps: obtaining the initial voltage of the switching power supply chip in the power supply system, and feedback information of the feedback circuit in the power supply system, wherein the feedback information is used to adjust the initial voltage of the switching power supply chip; based on the feedback information, adjusting the initial voltage to obtain the adjustment result and target voltage of the switching power supply chip; obtaining the working state of the load circuit in the power supply system, and based on the working state of the load circuit, the adjustment result and the target voltage, supplying power to the switching power supply chip.

[0123] Optionally, the computer-readable storage medium can also perform the following steps: powering the switching power supply chip based on the working state of the load circuit, the adjustment result and the target voltage, including: in response to the working state of the load circuit being an abnormal working state, and the adjustment result being that the target voltage is the same as the preset voltage of the switching power supply chip, powering the switching power supply chip based on the target voltage.

[0124] According to an embodiment of the present invention, a computer program product is further provided, including a computer program. When the computer program is executed by a processor, the method in each embodiment of the present invention is implemented.

[0125] Optionally, the computer program product may also perform the following steps: obtaining an initial voltage of a switching power supply chip in the power supply system, and feedback information of a feedback circuit in the power supply system, wherein the feedback information is used to adjust the initial voltage of the switching power supply chip; adjusting the initial voltage based on the feedback information to obtain an adjustment result and a target voltage of the switching power supply chip; obtaining an operating state of a load circuit in the power supply system, and supplying power to the switching power supply chip based on the operating state of the load circuit, the adjustment result and the target voltage.

[0126] Optionally, the computer program product may also perform the following steps: powering the switching power supply chip based on the working state of the load circuit, the adjustment result and the target voltage, including: in response to the working state of the load circuit being an abnormal working state and the adjustment result being that the target voltage is the same as the preset voltage of the switching power supply chip, powering the switching power supply chip based on the target voltage.

[0127] According to an embodiment of the present invention, a computer program product is also provided, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method in each embodiment of the present invention is implemented.

[0128] According to an embodiment of the present invention, a computer program is further provided. When the computer program is executed by a processor, the method in each embodiment of the present invention is implemented.

[0129] According to an embodiment of the present invention, a vehicle is also provided, which implements the method in each embodiment of the present invention when executed.

[0130] Optionally, the vehicle can also perform the following steps: obtaining the initial voltage of the switching power supply chip in the power supply system and the feedback information of the feedback circuit in the power supply system, wherein the feedback information is used to adjust the initial voltage of the switching power supply chip; based on the feedback information, adjusting the initial voltage to obtain the adjustment result and target voltage of the switching power supply chip; obtaining the working status of the load circuit in the power supply system, and supplying power to the switching power supply chip based on the working status of the load circuit, the adjustment result and the target voltage.

[0131] Optionally, the vehicle can also perform the following steps: based on the working state of the load circuit, the adjustment result and the target voltage, powering the switching power supply chip, including: in response to the working state of the load circuit being an abnormal working state, and the adjustment result being that the target voltage is the same as the preset voltage of the switching power supply chip, powering the switching power supply chip based on the target voltage.

[0132] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0133] In the above embodiments of the present invention, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0134] In the several embodiments provided by the present invention, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are merely illustrative. For example, the division of units can be a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, and can be electrical or other forms.

[0135] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple units. Some or all of the units may be selected to achieve the purpose of the present embodiment according to actual needs.

[0136] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0137] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk, etc. Various media that can store program codes.

[0138] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A high voltage power supply system, characterized in that: include: A load circuit is connected to the switching power supply chip of the power supply system and is used to control the switching power supply chip to output a target voltage; a power supply circuit, connected to the load circuit, and configured to supply power to the switching power supply chip according to the target voltage; A protection circuit connected between the power supply circuit and the switching power supply chip, for providing overvoltage protection to the switching power supply chip after power supply, so as to keep the power supply system in normal operation; A feedback circuit is connected between the protection circuit and the switching power supply chip, and is used to provide feedback information to the switching power supply chip after power is supplied, wherein the feedback information is used to adjust the initial voltage of the switching power supply chip.

2. The system according to claim 1, wherein: The power supply circuit comprises: a voltage divider circuit connected to the protection circuit and configured to divide the voltage flowing to the protection circuit; a first resistor connected to the voltage divider circuit; A voltage stabilizing circuit is connected between the load circuit and the first resistor, and is used to control the voltage in the voltage divider circuit.

3. The system according to claim 2, characterized in that The voltage divider circuit includes: a second resistor, a third resistor, a first transistor, a first voltage regulator, and a first capacitor and a second transistor, wherein the first voltage regulator is connected between the first resistor and the first transistor, the first transistor is connected to the first capacitor, the third resistor is connected to the second resistor, and the second resistor is connected between the first capacitor and the second transistor, the first transistor is used to control the current in the power supply circuit, the first voltage regulator is used to control the current to be less than or equal to a preset current, the first capacitor is used to protect the power supply circuit, and the second transistor is used to control the power supply circuit to be in the normal operating state.

4. The system according to claim 1, wherein: The protection circuit includes: a second voltage regulator, a fourth resistor, a fifth resistor, a third transistor, a fourth transistor, a third voltage regulator and a second capacitor, wherein the second capacitor is connected between the power supply circuit and the third voltage regulator, the fourth transistor is connected between the third voltage regulator and the third transistor, the third transistor is connected to the fourth resistor, the fourth resistor is connected between the fifth resistor and the second voltage regulator, the second voltage regulator is connected to the feedback circuit, the second voltage regulator is used to control the target voltage to be less than or equal to a preset voltage, the third transistor is used to respond to an overvoltage signal from the second voltage regulator, the fourth transistor is used to power the power chip, the third voltage regulator is used to control the pin voltage of the power chip to be less than or equal to a preset pin voltage, and the second capacitor is used to eliminate noise in the target voltage.

5. The system according to any one of claims 1 to 4, characterized in that The feedback circuit includes: a sixth resistor and a seventh resistor, wherein the sixth resistor is connected between the protection circuit and the switching power supply chip, and the seventh resistor is connected between the switching power supply chips.

6. A method for supplying power to a high-voltage power supply, characterized in that: The power supply system according to any one of claims 1 to 5 comprises: Acquiring an initial voltage of a switching power supply chip in the power supply system and feedback information from a feedback circuit in the power supply system, wherein the feedback information is used to adjust the output voltage of the switching power supply chip; Based on the feedback information, the initial voltage is adjusted to obtain an adjustment result and a target voltage of the switching power supply chip; The operating state of the load circuit in the power supply system is obtained, and based on the operating state of the load circuit, the adjustment result and the target voltage, the switching power supply chip is supplied with power.

7. The method according to claim 6, characterized in that Powering the switching power supply chip based on the working state of the load circuit, the adjustment result and the target voltage, including: In response to the operating state of the load circuit being an abnormal operating state, and the adjustment result being that the target voltage is the same as the preset voltage of the switching power supply chip, the switching power supply chip is powered based on the target voltage.

8. A high voltage power supply device, characterized in that: include: an acquisition unit, configured to acquire an initial voltage of a switching power supply chip in a power supply system and feedback information of a feedback circuit in the power supply system; an adjusting unit, configured to adjust the initial voltage based on the feedback information to obtain an adjustment result and a target voltage of the switching power supply chip; A power supply unit is used to obtain the working state of the load circuit in the power supply system, and supply power to the switching power supply chip based on the working state of the load circuit, the adjustment result and the target voltage.

9. An electronic device, characterized in that: include: a memory storing an executable program; A processor, configured to run the program, wherein the program executes the method according to any one of claims 6 to 7 when running.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium includes a stored executable program, wherein when the executable program is run, the device where the storage medium is located is controlled to execute the method according to any one of claims 6 to 7.

11. A computer program product, characterized in that The method comprises a computer program which, when executed by a processor, implements the method according to any one of claims 6 to 7.

12. A vehicle, characterized in that: The vehicle is used to perform the method according to any one of claims 6 to 7.

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