Power supply circuit and electronic device

Abstract

A power supply circuit and an electronic device. The power supply circuit comprises at least two power supply modules. A rectification output end (0O) and a thermoelectric standby output end (1O) are electrically connected and then are electrically connected to a primary low-voltage input end (2I); a primary low-voltage output end (2O) is electrically connected to a primary control input end (4I) of a primary control module (4); a primary low-voltage power supply module (2) is coupled with a secondary low-voltage power supply module (3) by means of a low-voltage transformer; in response to the primary control module (4) receiving a power supply fault signal sent by a rectification module (0), a circuit starting signal is sent to a thermoelectric standby module (1), so that the thermoelectric standby module (1) generates electric energy and then inputs the electric energy to the primary low-voltage power supply module (2) so that the primary control module (4) maintains working; and the primary control module (4) and a secondary control module (5) bidirectionally transmit signals.

Description

Power supply circuit and electronic equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on June 13, 2023, with application number 202310695735.X, and application name “A power supply circuit and electronic device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to a power supply circuit and an electronic device. Background Art

[0004] To improve server power supply stability, digital power supplies are now commonly used as server power supplies. Figure 1 shows the circuit block diagram of a single digital power supply. During operation, the transformer's primary control module communicates with the secondary control module via an optocoupler (the primary and secondary control modules are typically microcontroller units (MCUs) or digital signal processors (DSPs)). Simultaneously, the secondary control module communicates with the server system, transmitting primary and secondary real-time parameters to the server system. With the help of the secondary control module, the primary control module can communicate with the system, transmitting real-time primary power supply parameters and receiving system data.

[0005] Figure 1 also shows that the primary control module of the power supply is powered by a primary low-voltage power supply, which is in turn powered by the primary rectifier output, and the secondary control module is powered by the secondary low-voltage power supply. Simultaneously, the primary control module monitors whether the input voltage signal is normal. Once a fault occurs at the power input, communication between the primary and secondary control modules of the faulty power supply, as well as between the secondary control module and the host computer, is severed, resulting in the loss of communication with the host computer. The inventors recognized that if a power failure occurs on the primary side of the power supply during a firmware update, communication between the primary and secondary control modules will be interrupted, preventing the firmware code from being fully written to the primary control module, causing the power supply to completely lose functionality and become inoperable.

[0006] Summary of the Invention

[0007] According to various embodiments disclosed in the present application, in a first aspect, a power supply circuit is provided, the circuit including at least two power supply modules, the power supply module including: a rectifier module, a power factor correction module, a transformer, an output rectifier module connected in sequence, and further including a thermoelectric standby module, a primary low-voltage power supply module, a secondary low-voltage power supply module, a primary control module, and a secondary control module, the primary control module being used to control the power factor correction module to perform power correction, and the secondary control module being used to modulate the output rectifier module;

[0008] The rectifier output end of the rectifier module is electrically connected to the thermoelectric standby output end of the thermoelectric standby module and then electrically connected to the primary low-voltage input end of the primary low-voltage power supply module. The primary low-voltage output end of the primary low-voltage power supply module is electrically connected to the primary control input end of the primary control module. The primary low-voltage power supply module and the secondary low-voltage power supply module are coupled through a low-voltage transformer.

[0009] In response to the primary control module receiving a power failure signal from the rectifier module, the primary control module sends a circuit start signal to the thermoelectric backup module, causing the thermoelectric backup module to generate electrical energy and then input it into the low-voltage power supply module for the primary control module to maintain operation; and

[0010] The primary control module transmits signals bidirectionally to the secondary control module.

[0011] According to various embodiments disclosed in the present application, in a second aspect, an electronic device is provided. The electronic device includes the power supply circuit described in the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0013] FIG1 is a schematic diagram of a digital power supply circuit module;

[0014] FIG2 is a schematic diagram of a power supply module provided in an embodiment of the present application;

[0015] FIG3 is a schematic diagram of a connection of a secondary low-voltage power supply module provided in an embodiment of the present application;

[0016] FIG4 is a schematic diagram of a thermoelectric module provided in an embodiment of the present application;

[0017] FIG5 is a schematic diagram of a thermal electronic module provided in an embodiment of the present application;

[0018] FIG6 is a schematic diagram of a thermoelectric conversion module provided in an embodiment of the present application;

[0019] FIG7 is a schematic diagram of the principle of the Seebeck effect;

[0020] FIG8 is a schematic diagram of a thermoelectric chip provided in an embodiment of the present application;

[0021] FIG9 is a schematic diagram of fan airflow of a power module provided in an embodiment of the present application;

[0022] FIG10 is a schematic diagram of a first voltage conversion circuit provided in an embodiment of the present application;

[0023] FIG11 is a schematic diagram of another first voltage conversion circuit provided in an embodiment of the present application;

[0024] FIG12 is a schematic diagram of a thermoelectric chip attachment method provided in an embodiment of the present application;

[0025] FIG13 is a schematic diagram of a second voltage conversion circuit provided in an embodiment of the present application;

[0026] FIG14 is a schematic diagram of another second voltage conversion circuit provided in an embodiment of the present application;

[0027] FIG15 is a schematic diagram of a power supply module including a voltage stabilizing module provided in an embodiment of the present application;

[0028] FIG16 is a schematic diagram of a low voltage dropout linear voltage regulator circuit;

[0029] Figure 17 is a schematic diagram of a TL431 controllable precision voltage regulator;

[0030] FIG18 is a schematic diagram of a power supply module including a rectifier circuit provided in an embodiment of the present application;

[0031] FIG19 is a schematic diagram of a rectifier circuit provided in an embodiment of the present application;

[0032] FIG20 is a schematic diagram of a signal timing sequence of a power supply method provided in an embodiment of the present application;

[0033] FIG21 is a schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0035] Unless otherwise defined, technical or scientific terms used in this application should have the ordinary meaning understood by a person of ordinary skill in the art to which this application belongs. The terms "first," "second," and similar expressions used in this application do not denote any order, quantity, or importance, but are simply used to distinguish different components. Similarly, terms such as "a," "an," or "the" do not indicate a quantitative limitation, but rather indicate the presence of at least one. The numbers in the drawings in this specification merely distinguish between various functional components or modules and do not indicate a logical relationship between the components or modules. Terms such as "include" or "comprising" mean that the element or object preceding the term includes the elements or objects listed after the term, and their equivalents, without excluding other elements or objects. Terms such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0036] Hereinafter, various embodiments according to the present application will be described in detail with reference to the accompanying drawings. It should be noted that in the accompanying drawings, the same reference numerals are given to components having substantially the same or similar structures and functions, and repeated descriptions thereof will be omitted.

[0037] To address the problem in the prior art that when the primary side of a digital power supply loses power due to a fault, the primary control module loses power and loses the ability to communicate with the secondary control module, the present application provides the following implementation methods:

[0038] In some embodiments, as shown in FIG2 , a power supply circuit includes at least two power modules, the power modules including: a rectifier module 0, a power factor correction module, a transformer, and an output rectifier module connected in sequence, and also including a thermoelectric standby module 1, a primary low-voltage power supply module 2, a secondary low-voltage power supply module 3, a primary control module 4, and a secondary control module 5. The primary control module is used to control the power factor correction module to perform power correction, and the secondary control module is used to modulate the output rectifier module.

[0039] Rectifier output terminal 0 of rectifier module 0 O Thermoelectric backup output terminal 1 of thermoelectric backup module 1 O After electrical connection, it is connected to the primary low voltage input terminal 2 of the primary low voltage power supply module 2 I Electrical connection, primary low voltage output terminal 2 of primary low voltage power supply module 2 O The primary control input terminal 4 of the primary control module 4 IElectrically connected, the primary low-voltage power supply module 2 and the secondary low-voltage power supply module 3 are coupled through a low-voltage transformer 8; the primary low-voltage power supply module 2 and the secondary low-voltage power supply module 3 are coupled through the low-voltage transformer 8 to provide the corresponding input voltage for the secondary low-voltage power supply module.

[0040] In response to the primary control module 4 receiving the power failure signal sent by the rectifier module 0, a circuit start signal is sent to the thermoelectric backup module 1, so that the thermoelectric backup module 1 generates electrical energy and inputs it into the low-voltage power supply module 2 for the primary control module 4 to maintain operation; wherein, the circuit start signal includes: the circuit start signal includes a first start signal and a second start signal.

[0041] The primary control module 4 and the secondary control module 5 transmit signals bidirectionally.

[0042] The primary low-voltage power supply module is used to power the control circuits, drive circuits, or monitoring circuits of the main power circuit, meeting different voltage requirements. Typically, voltage specifications provided include 12V, 5V, and 3.3V. If the primary input loses power, the thermoelectric backup module 1 supplies power to the primary low-voltage power supply module 2, thereby ensuring the normal operation of the primary control module 4 and maintaining communication with the secondary control module 5.

[0043] Among them, the rectifier module and the output rectifier module can be implemented based on the rectifier circuit, and the power factor correction module can be implemented based on the power factor correction circuit.

[0044] As shown in FIG3 (the power factor correction module, transformer, and output rectifier module are not shown in FIG3 ), the secondary low-voltage output terminal 3 of the secondary low-voltage power supply module 3 O and the secondary control input terminal 5 of the secondary control module 5 I The secondary control module 5 is electrically connected to provide input voltage.

[0045] The power supply module also includes: a first output diode D O1 and the second output diode D O2 ;

[0046] The first output diode D O1 The anode of the second output diode D O2 After the cathode is electrically connected to the secondary low voltage output terminal 3 O electrical connection;

[0047] The first output diode D O1 The cathode of the second output diode D O2 After the anode is electrically connected to the secondary output terminal S O Electrical connection.

[0048] The power modules described above are designed for server power redundancy. In this redundant architecture, if a power supply's primary input fails, its secondary control module 5 can be powered by other power modules, ensuring normal operation. However, due to power safety regulations, the secondary low-voltage power supply module 3 cannot supply power to the primary low-voltage power supply module 2 via the low-voltage transformer 8.

[0049] In response to the primary control module receiving the power failure signal sent by the rectifier module, the power supply path from the primary low-voltage power supply module to the secondary low-voltage power supply module through the low-voltage transformer is disconnected.

[0050] Due to the redundant design of the power supply, the secondary low-voltage power supply module can obtain power from other power supply modules to supply the secondary control module; and because the thermal electric backup module generates less power, closing the power supply path to the secondary low-voltage power supply module can ensure that the power generated by the thermal electric backup module is used by the primary control module.

[0051] As shown in FIG4 , the thermoelectric standby module 1 includes: a first thermoelectric module 11 and a second thermoelectric module 12. The first thermoelectric module 11 includes: a first thermoelectric module output terminal 11 O The second thermal electronic module 12 includes: a second thermal electronic module output terminal 12 O , the first thermal electron module output terminal 11 O The second thermal electronic module output terminal 12 O After electrical connection, it serves as thermal power backup output terminal 1 O .

[0052] As shown in part (a) of FIG5 , the first thermoelectric module 11 includes: a first thermoelectric conversion module 111 and a first voltage conversion circuit 112. The first thermoelectric conversion module 111 includes: a first thermoelectric conversion module output terminal 111 O The first voltage conversion circuit 112 includes: a first voltage conversion circuit input terminal 112 I , the first voltage conversion circuit output terminal 112 O ; First thermoelectric conversion module output terminal 111 O and the first voltage conversion circuit input terminal 112 I Electrically connected to the first voltage conversion circuit output terminal 112 O As the first thermal electronic module output terminal 11 O .

[0053] Specifically, as shown in part (a) of FIG6 , the first thermoelectric conversion module 111 is a first thermoelectric chip TG1. The first thermoelectric chip TG1 includes: a first thermoelectric chip positive output terminal TG 1P , the negative output terminal TG of the first thermoelectric chip 1N; The first thermoelectric chip positive output terminal TG 1P As the first thermoelectric conversion module output terminal 111 O , the negative output terminal TG of the first thermoelectric chip 1N Ground.

[0054] Thermoelectric chips are based on the Seebeck effect, a device that uses two dissimilar metals or semiconductors to generate an electromotive force when exposed to a temperature difference. Figure 7 briefly illustrates the principle of the Seebeck effect.

[0055] The thermoelectric emf can be expressed as:

[0056] Among them, S A , S B are the Seebeck coefficients of the two materials respectively.

[0057] The thermoelectric chip used in the embodiment of the present application can be any one of TGM-127-1.0-0.8, TGM-127-1.0-1.3, TGM-127-1.0-2.5, TGM-127-1.4-1.5, TGM-127-1.4-2.5, TGM-199-1.4-0.8, TGM-199-1.4-1.5, TGM-199-1.4-3.2, TGM-254-1.0-1.3, TGM-287-1.0-1.3, and TGM-287-1.0-1.5 produced by KRYOTHERM. This application does not limit the brand and specific model of the thermoelectric chip. For ease of description, only the structures of the first thermoelectric chip TG1 and the second thermoelectric chip TG2 are explained with the help of KRYOTHERM's thermoelectric chip products.

[0058] As shown in part (a) of FIG8 , the first thermoelectric chip TG1 further includes: a first thermoelectric chip hot end TG 1H The first thermoelectric chip hot end TG 1H Attached to the first preset position, wherein the first preset position is set at: when the power supply is working, the surface of the heat sink located in the power supply housing and closest to the highest temperature point, as shown in position B in Figure 9. 1H Attached to the first preset position, the first chip can generate a temperature difference electromotive force.

[0059] Airflow, driven by a blower (usually a fan), flows from the air inlet through the power supply's interior and is exhausted by the fan. The power supply houses numerous power devices, generating significant heat during operation, which is blown out by the fan. Schematically, position B represents the highest temperature point within the power supply, where a heat sink is typically located. During operation, the heat source near the heat sink can reach temperatures as high as 100-110°C. This heat is removed by the airflow, creating a temperature difference between the heat sink and the power supply's internal environment. The first thermoelectric chip TG1 utilizes this temperature difference to generate an electromotive force.

[0060] The following is a brief introduction to the thermal properties of heat sinks. Power modules often use aluminum or copper as the main material for heat sinks. Therefore, the thermal conductivity, heat capacity, specific heat capacity and other characteristics of copper and aluminum can be used for design. The specific heat capacity of aluminum is 0.9J / g℃, while that of copper is 0.39J / g℃. The larger the specific heat capacity, the slower the temperature rise. Calculated based on 1 gram of aluminum and copper, it is equivalent to 0.9J of heat energy required for every 1℃ rise in aluminum and 0.39J of heat energy required for every 1℃ rise in copper. In addition, the thermal conductivity of copper is 401W / mK, while the thermal conductivity of aluminum is 237W / mK. Copper is 1.69 times that of aluminum. That is, under the same conditions, copper is easier to conduct heat than aluminum, but the density of copper is 8.9kg / m 3 , while aluminum is only 2.7kg / m 3 , close to 3.3 times that of aluminum. For heat sinks of the same volume, pure copper has a higher heat capacity than pure aluminum. Even though it is easy to conduct heat, it is more difficult to dissipate heat. Therefore, the larger the heat capacity, the slower the heat dissipation, and the higher the specific heat capacity, the higher the heat energy required to increase the temperature.

[0061] The primary power supply control module 4 typically includes an MCU (microcontroller unit) and / or a DSP (digital signal processor). For example, the MCU chips and DSPs commonly used in digital power supplies, such as the MICROCHIP-dsPIC33FJ64GS606 and TI-UCD3138, operate at milliampere levels, eliminating the need for a high-power power supply circuit to power the primary power supply control module 4. The voltage and current generated by a thermoelectric chip are sufficient for this purpose. However, the thermoelectric voltage generated by the thermoelectric chip cannot precisely match the input voltage of the MCU / DSP. Therefore, additional circuitry is required after the first thermoelectric conversion module 111 to achieve a voltage that meets the MCU / DSP input requirements.

[0062] Specifically, as shown in FIG10 , the first voltage conversion circuit 112 includes: a first transistor T1, a first resistor R1, a first mutual inductance coil L1, and a second mutual inductance coil L2. 11The first resistor R1 is connected in series and electrically connected to one end of the first mutual inductance coil L1. The second electrode T 12 One end of the second mutual inductance coil L2 is electrically connected, and the other end of the second mutual inductance coil L2 is electrically connected to the other end of the first mutual inductance coil L1 and serves as the first voltage conversion circuit input end 112. I , the second electrode of the first transistor T 12 As the first voltage conversion circuit output terminal 112 O , the third electrode of the first transistor T 13 One end of the first mutual inductance coil L1 and the other end of the second mutual inductance coil L2 are the same end.

[0063] Typically, the thermoelectric chip needs to be boosted to meet the input voltage requirements of the MCU / DSP. Figure 10 shows a Joule Thief circuit, which is a self-oscillating boost circuit. The embodiment of the present application takes the Joule Thief circuit as an example to describe the specific form of the first voltage conversion circuit 112. The first voltage conversion circuit 112 converts the voltage converted from the temperature of the first thermoelectric conversion module 111 into a higher voltage pulse form. The principle of the Joule Thief circuit is not described here. Voltage converters of other topological structures can also be used as specific forms of the first voltage conversion circuit 112.

[0064] In some other embodiments, as shown in FIG11 , the first voltage conversion circuit 112 further includes: a second transistor T2 and a second resistor R2. 21 is electrically connected to one end of the second resistor R2, the other end of the second resistor R2 is used to receive the first start signal, and the second electrode T of the second transistor 22 and the first electrode T of the first transistor 11 Electrically connected, the second transistor third electrode T 23 Grounded, wherein the first start signal is used to start the first voltage conversion circuit 112. When the first transistor T1 is an NPN transistor, the first electrode T 11 is the base, the second electrode T 12 is the collector, the third electrode of the first transistor T 13 The second transistor T2 can be an NPN transistor or an NMOS transistor. Taking the NMOS transistor as an example, the first electrode T 21 is the gate, the second electrode T of the second transistor 22 is the drain, the third electrode T 23 For the source.

[0065] The first shutdown signal is at a high level, which makes the first voltage conversion circuit 112 not work; the first start signal is at a low level, which makes the first voltage conversion circuit 112 start to work. When the first voltage conversion circuit 112 receives the first start signal from the power primary control module 4, the second transistor T2 is turned off, so that the current passing through the first mutual inductance coil L1 and the first resistor R1 flows into the first electrode T1 of the first transistor. 11 , turn on the first voltage conversion circuit 112, and the output terminal 112 of the first voltage conversion circuit O Output voltage to the next stage.

[0066] As shown in part (b) of FIG5 , the second thermoelectric module 12 includes: a second thermoelectric conversion module 121 and a second voltage conversion circuit 122. The second thermoelectric conversion module 121 includes: a second thermoelectric conversion module output terminal 121 O The second voltage conversion circuit 122 includes: a second voltage conversion circuit input terminal 122 I , the second voltage conversion circuit output terminal 122 O ; Second thermoelectric conversion module output terminal 121 O and the second voltage conversion circuit input terminal 122 I Electrically connected to the second voltage conversion circuit output terminal 122 O As the second thermal electronic module output terminal 12 O .

[0067] Specifically, as shown in part (b) of FIG6 , the second thermoelectric conversion module 121 is a second thermoelectric chip TG2. The second thermoelectric chip TG2 includes: a second thermoelectric chip positive output terminal TG 2P , the negative output terminal TG of the second thermoelectric chip 2N ; The second thermoelectric chip positive output terminal TG 2P As the second thermoelectric conversion module output terminal 121 O , the negative output terminal TG of the second thermoelectric chip 2N Ground.

[0068] As shown in part (b) of FIG8 , the second thermoelectric chip TG2 further includes: a second thermoelectric chip cold end TG 2C The second thermoelectric chip cold end TG 2C Attached to the second preset position, wherein the second preset position is set at: the surface of the heat sink closest to the power air inlet or power air outlet in the power housing, such as the position shown by A or C in Figure 9.

[0069] Figure 9 schematically illustrates the direction of the airflow inside the power supply. When the server is operating normally, this airflow will carry the heat discharged from the server chassis. Therefore, the temperature of the airflow blowing into the air inlet of the power supply usually reaches 45-55°C. When the power supply is operating normally, the maximum temperature of the heat sink at the air outlet is lower than the airflow temperature at the power supply inlet or power supply outlet, which will reduce the second thermoelectric chip cold end TG 2C Attached to the second preset position, the second chip can generate a temperature difference electromotive force.

[0070] FIG12 schematically shows the attachment positions of the hot end of the first thermoelectric chip and the cold end of the second thermoelectric chip at point B and point A. ...

[0071] Specifically, as shown in FIG13 , the second voltage conversion circuit 122 includes: a third transistor T3, a third resistor R3, a third mutual inductance coil L3, and a fourth mutual inductance coil L4. 31 The third resistor R3 is connected in series and electrically connected to one end of the third mutual inductance coil L3. The second electrode T 32 One end of the fourth mutual inductance coil L4 is electrically connected to the other end of the third mutual inductance coil L3, and the other end of the fourth mutual inductance coil L4 is electrically connected to the other end of the third mutual inductance coil L3 to serve as the second voltage conversion circuit input end 122. I , the second electrode of the third transistor T 32 As the second voltage conversion circuit output terminal 122 O , the third transistor third electrode T 33 Ground.

[0072] One end of the third mutual inductance coil L3 and the other end of the fourth mutual inductance coil L4 are the same end.

[0073] In some other embodiments, as shown in FIG14 , the second voltage conversion circuit 122 further includes: a fourth transistor T4 and a fourth resistor R4. 41 The second terminal of the fourth transistor T is electrically connected to one end of the fourth resistor R4. The other end of the fourth resistor R4 is used to receive the second start signal. 42 and the first electrode T of the third transistor 31 Electrically connected, the third electrode T of the fourth transistor 43 Grounded, wherein the second start signal is used to start the second voltage conversion circuit 122. When the third transistor T3 is an NPN transistor, the first electrode of the third transistor T 31 is the base, the second electrode T 32 is the collector, the third transistor T 33 The fourth transistor T4 can be an NPN transistor or an NMOS transistor. Taking the NMOS transistor as an example, the first electrode T 41 is the gate, the second electrode T of the fourth transistor42 is the drain, the third electrode T 43 For the source.

[0074] The second shutdown signal is at a high level, which makes the second voltage conversion circuit 122 not work; the second start signal is at a low level, which makes the second voltage conversion circuit 122 start working. When the second voltage conversion circuit 122 receives the second start signal sent by the power primary control module 4, the fourth transistor T4 is turned off, so that the current passing through the third mutual inductance coil L3 and the third resistor R3 flows into the first electrode T of the third transistor. 31 , turn on the second voltage conversion circuit 122, and the second voltage conversion circuit output terminal 122 O Output voltage to the next stage.

[0075] Preferably, the first transistor T1 and the third transistor T3 are NPN transistors.

[0076] Due to the self-oscillation characteristics of the Joule thief circuit, the output voltage has large ripples. Adding a voltage stabilizing circuit at the back of the voltage conversion circuit can provide a stable voltage input for the power primary control module 4.

[0077] Preferably, the power supply module further includes a voltage stabilizing module 6; as shown in FIG15 , the voltage stabilizing input terminal 6 of the voltage stabilizing module 6 I With thermal standby output 1 O Electrical connection, the voltage stabilization output terminal 6 of the voltage stabilization module 6 O With primary low voltage input terminal 2 I Electrical connection.

[0078] Preferably, the voltage stabilization module 6 is a low dropout (LDO) linear regulator. Figure 16 shows a typical circuit for a low dropout linear regulator. Alternatively, a TL431 can be used in conjunction with a power transistor to form a voltage stabilization circuit, as shown in Figure 17. The operating principles of the LDO and TL431 circuits are not detailed here.

[0079] Preferably, the power module further includes: a rectifier circuit 7, as shown in FIG18, the rectifier circuit input terminal 7 I With thermal standby output 1 O Electrical connection, rectifier circuit output 7 O With regulated output port 6 I Electrical connection.

[0080] Specifically, as shown in FIG19 , the rectifier circuit 7 includes: a diode D, a capacitor C;

[0081] Diode cathode D C is electrically connected to one end of the capacitor, and the other end of the capacitor is grounded;

[0082] Diode anode D A As the input terminal 7 of the rectifier circuit I , diode cathode D C As the output terminal 7 of the rectifier circuit O .

[0083] In other embodiments, a power supply method is applied to the power supply circuit described in the first aspect above, whereby a primary low-voltage power supply module supplies power to a primary control module and maintains communication between the primary control module and a secondary control module. The method includes:

[0084] S100: In response to obtaining a power failure signal, sending a circuit start signal to the thermoelectric backup module to enable the thermoelectric backup module to operate and provide input voltage to the primary low-voltage power supply module.

[0085] Specifically, S110: obtaining a power input indication signal and a power primary control module input monitoring signal, and determining whether the power input is abnormal based on the power input indication signal and the power primary control module input monitoring signal;

[0086] The power input indication signal can indicate either a power failure or normal operation. The primary control module input monitoring signal is the monitoring signal inputted by the primary control module itself. An abnormality in both the power input indication signal and the primary control module input signal indicates a power input anomaly.

[0087] S120: In response to the abnormal power input, sending a first start signal to the first thermal electronic module and obtaining a monitoring signal of the first thermal electronic module;

[0088] S130: Obtain a power input indication signal and a first thermal electronic module monitoring signal, and determine whether the first thermal electronic module is abnormal based on the power input indication signal and the first thermal electronic module monitoring signal; if the power input indication signal is abnormal and the first thermal electronic module detection signal is abnormal at the same time, it indicates that the first thermal electronic module is abnormal.

[0089] S140 : In response to the first thermal electronic module being abnormal, sending a second start signal to the second thermal electronic module.

[0090] Typically, the redundant power supply module itself has two alarm signals: Input_OK, which is an alarm signal indicating whether the input is normal or not, and Output_OK, which is an alarm signal indicating whether the output is normal or not. Through these two alarm signals, the power supply control module can obtain the status of its own input and output. Under normal working conditions, the power input indication signal is normal, and the power supply primary control module 4 continuously sends a first shutdown signal to the first thermal electronic module 11. The first shutdown signal is high. The second transistor T2 is turned on by the first shutdown signal, thereby pulling down the first electrode T of the first transistor.11 The first voltage conversion circuit 112 does not work, and the primary low-voltage power supply 3 is powered by the power input to supply power to the primary control module 4, as shown in the period t1 in FIG20 .

[0091] When the power input indication signal is detected to be abnormal, it indicates that the power input has failed. The power primary control module 4 cannot maintain normal operation by the power input, and the input voltage of the power primary control module is abnormal, as shown in the period t2 in Figure 20. At this time, a first start signal is sent to the first thermal electronic module 11, and the first start signal is at a low level. The first start signal turns off the second transistor T2, so that the current passing through the first mutual inductance coil L1 and the first resistor R1 flows into the first electrode T of the first transistor. 11 , the first voltage conversion circuit 112 is turned on, and the primary control module 4 is then powered by the first thermal electronic module 11, as shown in time period t3 in Figure 20. During the power supply process of the first thermal electronic module 11, due to the discharge of the large capacitor of the primary low-voltage power supply, the first thermal electronic module 11 and the primary low-voltage power supply alternately supply power, but the two do not affect each other.

[0092] After the power input fails, the primary fails, the primary power devices no longer participate in the work, and stop generating heat. Under the redundant design, the fan continues to rotate to dissipate heat, and the internal temperature of the power supply gradually decreases, so that the temperature difference between the heat sink and the heat flow driven by the fan gradually decreases. When the internal temperature difference of the power supply is not enough to support the first thermal electronic module 11 to supply power to the primary control module 4 of the power supply, the operation of the first thermal electronic module 11 becomes abnormal. When the power input indication signal is monitored to be abnormal, and the first thermal electronic module 11 is working abnormally, the primary control module 4 of the power supply sends a first shutdown signal to the first thermal electronic module 11, and sends a second start signal to the second thermal electronic module 12, and the second start signal is low. The operation of the first thermal electronic module 11 is cut off by the first shutdown signal; the fourth transistor T4 is turned off by the second start signal, so that the current passing through the third mutual inductance coil L3 and the third resistor R3 flows into the first electrode T of the third transistor 31 , the second voltage conversion circuit 122 is turned on, and the primary control module 4 is randomly powered by the second thermal electron module 12 as shown in the period t4 in FIG. 20 .

[0093] S150: In response to the abnormality of the power input indication signal and the abnormal operation of the second thermal electronic module, interrupting the current task of the power supply and issuing a power failure alarm.

[0094] In response to the abnormality of the power input indication signal and the abnormal operation of the second thermal electronic module 12 , it is necessary to take timely maintenance measures for the power supply to avoid complete failure of the power supply.

[0095] The input voltage of the primary power supply control module can be monitored by comparing the input voltage with a reference voltage. The operating status of the first thermoelectric module can be monitored by detecting the input voltage of the primary power supply control module. When the first thermoelectric module is operating, the input voltage of the primary power supply control module is less than a first voltage threshold, indicating that the first thermoelectric module is operating abnormally. Alternatively, the monitoring can be achieved by measuring the temperature difference that causes the first thermoelectric conversion module 111 to operate. When the temperature difference is less than the first temperature difference threshold, the first thermoelectric module is determined to be operating abnormally. Similarly, when the second thermoelectric module is operating, the input voltage of the primary power supply control module is less than a second voltage threshold, indicating that the second thermoelectric module is operating abnormally. Alternatively, the monitoring can be achieved by measuring the temperature difference that causes the second thermoelectric conversion module 121 to operate. When the temperature difference is less than the second temperature difference threshold, indicating that the second thermoelectric module is operating abnormally. Acquiring the temperature difference can be achieved using a thermistor or thermocouple in conjunction with a voltage detection circuit, which will not be detailed here.

[0096] It should be noted that the second voltage threshold is typically higher than the first voltage threshold; and the second temperature difference threshold is typically higher than the first temperature difference threshold. Since the second thermal electronic module 12 provides the last power supply input to the primary power supply control module when the power input is abnormal, monitoring of abnormal operating conditions of the second thermal electronic module is more stringent. This ensures that, before the second thermal electronic module 12 fails, while the primary power supply control module 4 is still able to communicate with the secondary power supply control module 5, timely maintenance measures can be taken to prevent complete power supply failure. This measure is particularly important during firmware updates for digital power supplies. If the thermoelectric potential is not maintained long enough to complete the firmware update, an immediate alarm is issued. Maintenance personnel can then replace the power supply or re-update it.

[0097] Preferably, the power supply method further includes:

[0098] S200: Disconnecting the power supply path from the primary low-voltage power supply module to the secondary low-voltage power supply module through the low-voltage transformer.

[0099] Since the thermal power standby module generates less power, closing the power supply path to the secondary low-voltage power supply module can ensure that the power generated by the thermal power standby module is used by the primary control module.

[0100] At the same time, due to the redundant design of the power supply, the secondary low-voltage power supply module can obtain power from other power supply modules to supply the secondary control module.

[0101] In other embodiments, as shown in FIG21 , an electronic device includes the power supply circuit described in the first aspect above.

[0102] By implementing the power supply circuit and electronic device disclosed in the embodiments of the present application, it is possible to continuously supply power to the primary control module of a digital power supply and maintain communication between the primary control module and the secondary control module even if the primary circuit of the digital power supply loses power due to a fault. During a digital power supply firmware update, the power supply environment for the firmware update is guaranteed, and an alarm signal is issued before the power supply circuit energy is about to be exhausted, so that further measures can be taken to ensure the implementation of the digital power supply firmware update operation. The waste heat generated by the power supply and chassis during server operation is fully utilized as an energy source for power supply.

[0103] All of the above optional technical solutions can be combined in any way to form optional embodiments of the present application, and will not be described in detail here.

[0104] Example 1

[0105] A power supply circuit has at least two power modules, as shown in FIG2 , including:

[0106] The rectifier module 0, power factor correction module, transformer, and output rectifier module are connected in sequence; the rectifier module 0 also includes a thermoelectric standby module 1, a primary low-voltage power supply module 2, a secondary low-voltage power supply module 3, a primary control module 4, a secondary control module 5, and the primary control module is used to control the power factor correction module to perform power correction, and the secondary control module is used to modulate the output rectifier module 0; the rectifier output terminal 0 of the rectifier module 0 O Thermoelectric backup output terminal 1 of thermoelectric backup module 1 O After electrical connection, it is connected to the primary low voltage input terminal 2 of the primary low voltage power supply module 2 I Electrical connection, primary low voltage output terminal 2 of primary low voltage power supply module 2 O The primary control input terminal 4 of the primary control module 4 I Electrically connected, the primary low-voltage power supply module 2 and the secondary low-voltage power supply module 3 are coupled via a low-voltage transformer 6;

[0107] In response to the primary control module 4 receiving the power failure signal sent by the rectifier module 0, it sends a circuit start signal to the thermoelectric backup module 1, so that the thermoelectric backup module 1 generates electrical energy and inputs it to the low-voltage power supply module 2, so that the primary control module 4 can maintain operation;

[0108] The primary control module 4 and the secondary control module 5 transmit signals bidirectionally.

[0109] Example 2

[0110] On the basis of the first embodiment, as shown in FIG3 , the secondary low-voltage output terminal 3 of the secondary low-voltage power supply module 3 O and the secondary control input terminal 5 of the secondary control module 5 I The secondary control module 5 is electrically connected to provide input voltage.

[0111] The power supply module also includes: a first output diode D O1 and the second output diode D O2 ;

[0112] The first output diode D O1 The anode of the second output diode D O2 After the cathode is electrically connected to the secondary low voltage output terminal 3 O electrical connection;

[0113] The first output diode D O1 The cathode of the second output diode D O2 After the anode is electrically connected to the secondary output terminal S O Electrical connection.

[0114] In response to the primary control module receiving the power failure signal sent by the rectifier module, the power supply path from the primary low-voltage power supply module to the secondary low-voltage power supply module through the low-voltage transformer is disconnected.

[0115] As shown in FIG4 , the thermoelectric standby module 1 includes: a first thermoelectric module 11 and a second thermoelectric module 12. The first thermoelectric module 11 includes: a first thermoelectric module output terminal 11 O The second thermal electronic module 12 includes: a second thermal electronic module output terminal 12 O , the first thermal electron module output terminal 11 O The second thermal electronic module output terminal 12 O After electrical connection, it serves as thermal power backup output terminal 1 O .

[0116] As shown in part (a) of FIG5 , the first thermoelectric module 11 includes: a first thermoelectric conversion module 111 and a first voltage conversion circuit 112. The first thermoelectric conversion module 111 includes: a first thermoelectric conversion module output terminal 111 O The first voltage conversion circuit 112 includes: a first voltage conversion circuit input terminal 112 I , the first voltage conversion circuit output terminal 112 O ; First thermoelectric conversion module output terminal 111 O and the first voltage conversion circuit input terminal 112 I Electrically connected to the first voltage conversion circuit output terminal 112 O As the first thermal electronic module output terminal 11 O .

[0117] Specifically, as shown in part (a) of FIG6 , the first thermoelectric conversion module 111 is a first thermoelectric chip TG1. The first thermoelectric chip TG1 includes: a first thermoelectric chip positive output terminal TG 1P , the negative output terminal TG of the first thermoelectric chip1N ; The first thermoelectric chip positive output terminal TG 1P As the first thermoelectric conversion module output terminal 111 O , the negative output terminal TG of the first thermoelectric chip 1N Ground.

[0118] As shown in part (a) of FIG8 , the first thermoelectric chip TG1 further includes: a first thermoelectric chip hot end TG 1H The first thermoelectric chip hot end TG 1H Attached to the first preset position, wherein the first preset position is set at: when the power supply is working, the surface of the heat sink located in the power supply housing and closest to the highest temperature point, as shown in position B in Figure 9. 1H Attached to the first preset position, the first chip can generate a temperature difference electromotive force.

[0119] Specifically, as shown in FIG10 , the first voltage conversion circuit 112 includes: a first transistor T1, a first resistor R1, a first mutual inductance coil L1, and a second mutual inductance coil L2. 11 The first resistor R1 is connected in series and electrically connected to one end of the first mutual inductance coil L1. The second electrode T 12 One end of the second mutual inductance coil L2 is electrically connected, and the other end of the second mutual inductance coil L2 is electrically connected to the other end of the first mutual inductance coil L1 and serves as the first voltage conversion circuit input end 112. I , the second electrode of the first transistor T 12 As the first voltage conversion circuit output terminal 112 O , the third electrode of the first transistor T 13 One end of the first mutual inductance coil L1 and the other end of the second mutual inductance coil L2 are the same end.

[0120] As shown in FIG11 , the first voltage conversion circuit 112 further includes: a second transistor T2 and a second resistor R2. 21 is electrically connected to one end of the second resistor R2, the other end of the second resistor R2 is used to receive the first start signal, and the second electrode T of the second transistor 22 and the first electrode T of the first transistor 11 Electrically connected, the second transistor third electrode T 23 Grounded, wherein the first start signal is used to start the first voltage conversion circuit 112. When the first transistor T1 is an NPN transistor, the first electrode T 11 is the base, the second electrode T 12 is the collector, the third electrode of the first transistor T 13The second transistor T2 can be an NPN transistor or an NMOS transistor. Taking the NMOS transistor as an example, the first electrode T 21 is the gate, the second electrode T of the second transistor 22 is the drain, the third electrode T 23 For the source.

[0121] As shown in part (b) of FIG5 , the second thermoelectric module 12 includes: a second thermoelectric conversion module 121 and a second voltage conversion circuit 122. The second thermoelectric conversion module 121 includes: a second thermoelectric conversion module output terminal 121 O The second voltage conversion circuit 122 includes: a second voltage conversion circuit input terminal 122 I , the second voltage conversion circuit output terminal 122 O ; Second thermoelectric conversion module output terminal 121 O and the second voltage conversion circuit input terminal 122 I Electrically connected to the second voltage conversion circuit output terminal 122 O As the second thermal electronic module output terminal 12 O .

[0122] Specifically, as shown in part (b) of FIG6 , the second thermoelectric conversion module 121 is a second thermoelectric chip TG2. The second thermoelectric chip TG2 includes: a second thermoelectric chip positive output terminal TG 2P , the negative output terminal TG of the second thermoelectric chip 2N ; The second thermoelectric chip positive output terminal TG 2P As the second thermoelectric conversion module output terminal 121 O , the negative output terminal TG of the second thermoelectric chip 2N Ground.

[0123] As shown in part (b) of FIG8 , the second thermoelectric chip TG2 further includes: a second thermoelectric chip cold end TG 2C The second thermoelectric chip cold end TG 2C Attached to the second preset position, wherein the second preset position is set at: the surface of the heat sink closest to the power air inlet or power air outlet in the power housing, such as the position shown by A or C in Figure 9.

[0124] Figure 9 schematically illustrates the direction of the airflow inside the power supply. When the server is operating normally, this airflow will carry the heat discharged from the server chassis. Therefore, the temperature of the airflow blowing into the air inlet of the power supply usually reaches 45-55°C. When the power supply is operating normally, the maximum temperature of the heat sink at the air outlet is lower than the airflow temperature at the power supply inlet or power supply outlet, which will reduce the second thermoelectric chip cold end TG 2C Attached to the second preset position, the second chip can generate a temperature difference electromotive force.

[0125] FIG12 schematically shows the attachment positions of the hot end of the first thermoelectric chip and the cold end of the second thermoelectric chip at point B and point A. ...

[0126] As shown in FIG13 , the second voltage conversion circuit 122 includes: a third transistor T3, a third resistor R3, a third mutual inductance coil L3, and a fourth mutual inductance coil L4. 31 The third resistor R3 is connected in series and electrically connected to one end of the third mutual inductance coil L3. The second electrode T 32 One end of the fourth mutual inductance coil L4 is electrically connected to the other end of the third mutual inductance coil L3, and the other end of the fourth mutual inductance coil L4 is electrically connected to the other end of the third mutual inductance coil L3 to serve as the second voltage conversion circuit input end 122. I , the second electrode of the third transistor T 32 As the second voltage conversion circuit output terminal 122 O , the third transistor third electrode T 33 Ground.

[0127] One end of the third mutual inductance coil L3 and the other end of the fourth mutual inductance coil L4 are the same end.

[0128] As shown in FIG14 , the second voltage conversion circuit 122 further includes: a fourth transistor T4 and a fourth resistor R4. 41 The second terminal of the fourth transistor T is electrically connected to one end of the fourth resistor R4. The other end of the fourth resistor R4 is used to receive the second start signal. 42 and the first electrode T of the third transistor 31 Electrically connected, the third electrode T of the fourth transistor 43 Grounded, wherein the second start signal is used to start the second voltage conversion circuit 122. When the third transistor T3 is an NPN transistor, the first electrode of the third transistor T 31 is the base, the second electrode T 32 is the collector, the third transistor T 33 The fourth transistor T4 can be an NPN transistor or an NMOS transistor. Taking the NMOS transistor as an example, the first electrode T 41 is the gate, the second electrode T of the fourth transistor 42 is the drain, the third electrode T 43 For the source.

[0129] The first transistor T1 and the third transistor T3 are NPN transistors.

[0130] The power supply module also includes a voltage stabilizing module 6; as shown in FIG15 , the voltage stabilizing input terminal 6 of the voltage stabilizing module 6 I With thermal standby output 1 OElectrical connection, the voltage stabilization output terminal 6 of the voltage stabilization module 6 O With primary low voltage input terminal 2 I Electrical connection.

[0131] Voltage regulator module 6 is a low dropout (LDO) linear regulator. Figure 16 shows a typical circuit for a low dropout linear regulator. Alternatively, a TL431 can be used in conjunction with a power transistor to form a voltage regulator circuit, as shown in Figure 17. The operating principles of the LDO and TL431 circuits are not detailed here.

[0132] The power supply module also includes: a rectifier circuit 7, as shown in FIG18, the rectifier circuit input terminal 7 I With thermal standby output 1 O Electrical connection, rectifier circuit output 7 O Electrically connected to the voltage regulated output port 6I.

[0133] As shown in FIG19 , the rectifier circuit 7 includes: a diode D, a capacitor C;

[0134] Diode cathode D C is electrically connected to one end of the capacitor, and the other end of the capacitor is grounded;

[0135] Diode anode D A As the input terminal 7 of the rectifier circuit I , diode cathode D C As the output terminal 7 of the rectifier circuit O .

[0136] Example 3

[0137] A power supply method, applied to the power supply circuit described in the first aspect above, enables a primary low-voltage power supply module to power a primary control module and maintains communication between the primary control module and a secondary control module, the method comprising:

[0138] S100: In response to obtaining a power failure signal, sending a circuit start signal to the thermoelectric backup module to enable the thermoelectric backup module to operate and provide input voltage to the primary low-voltage power supply module.

[0139] Example 4

[0140] The power supply method based on the third embodiment further includes:

[0141] S200: Disconnecting the power supply path from the primary low-voltage power supply module to the secondary low-voltage power supply module through the low-voltage transformer.

[0142] Example 5

[0143] An electronic device, as shown in Figure 21, includes the power supply circuit described in Example 2. In particular, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product, which includes a computer program loaded on a computer-readable medium, and the computer program contains program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through a communication device, or installed from a memory, or installed from a ROM. When the computer program is executed by an external processor, the above-mentioned functions defined in the method of the embodiment of the present application are executed.

[0144] According to the embodiments of the present application, the beneficial effects brought about by the provided technical solution are:

[0145] 1. By implementing the power supply circuit and electronic device disclosed in the embodiments of the present application, it is possible to continuously supply power to the primary control module of a digital power supply when the primary stage loses power due to a fault, maintain communication between the primary control module and the secondary control module, and further maintain communication between the primary control module and the server system or host computer;

[0146] 2. During the digital power supply firmware update process, ensure the power supply environment for the firmware update and issue an alarm signal before the power supply circuit energy is about to be exhausted so that further measures can be taken to ensure the implementation of the digital power supply firmware update operation and improve the reliability of the digital power supply;

[0147] 3. Before the backup power fails, safely interrupt the current task of the digital power supply to ensure that the normal function of the digital power supply is not lost;

[0148] 4. Make full use of the waste heat generated by the power supply and chassis during the operation of the server as the energy source for power supply.

[0149] It should be noted that the computer-readable medium of the embodiments of the present application may be a computer-readable signal medium or a computer-readable storage medium or any combination of the two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or component, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the embodiments of the present application, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, device or device. In the embodiments of the present application, the computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, which carries a computer-readable program code. This propagated data signal may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or convey a program for use by or in conjunction with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium may be conveyed using any suitable medium, including but not limited to wires, optical cables, RF (Radio Frequency), or any suitable combination thereof.

[0150] The computer-readable medium may be included in the server or may exist independently and not incorporated into the server. The computer-readable medium carries one or more programs that, when executed by the server, cause the server to: in response to detecting that the terminal's peripheral mode is inactive, obtain the frame rate of applications on the terminal; when the frame rate meets a screen-off condition, determine whether the user is currently accessing the terminal's screen information; and, in response to determining that the user is not accessing the terminal's screen information, control the screen to enter an immediate dimming mode.

[0151] Computer program code for performing the operations of embodiments of the present application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0152] Each embodiment in this specification is described in a progressive manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments. In particular, for system or system embodiments, since they are basically similar to method embodiments, the description is relatively simple. For relevant parts, refer to the partial description of the method embodiment. The system and system embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. A person of ordinary skill in the art can understand and implement it without expending creative work.

[0153] The above is a detailed introduction to the technical solutions provided by this application. Specific examples are used herein to illustrate the principles and implementation methods of this application. The description of the above embodiments is only intended to help understand the method and core concept of this application. At the same time, for those skilled in the art, based on the concept of this application, there may be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting this application.

[0154] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A power supply circuit, comprising at least two power supply modules, wherein the power supply modules include: A rectifier module, a power factor correction module, a transformer, and an output rectifier module connected in sequence, characterized in that the power supply module also includes a thermoelectric standby module, a primary low-voltage power supply module, a secondary low-voltage power supply module, a primary control module, and a secondary control module, wherein the primary control module is used to control the power factor correction module to perform power correction, and the secondary control module is used to modulate the output rectifier module; The rectifier output end of the rectifier module is electrically connected to the thermoelectric standby output end of the thermoelectric standby module and then electrically connected to the primary low-voltage input end of the primary low-voltage power supply module. The primary low-voltage output end of the primary low-voltage power supply module is electrically connected to the primary control input end of the primary control module. The primary low-voltage power supply module is coupled to the secondary low-voltage power supply module through a low-voltage transformer; In response to the primary control module receiving a power failure signal sent by the rectifier module, the primary control module sends a circuit start signal to the thermoelectric backup module, so that the thermoelectric backup module generates electrical energy and then inputs it into the low-voltage power supply module, so that the primary control module can maintain operation; and The primary control module and the secondary control module transmit signals bidirectionally.

2. The power supply circuit according to claim 1, characterized in that: The secondary low-voltage output terminal of the secondary low-voltage power supply module is electrically connected to the secondary control input terminal of the secondary control module to provide input voltage for the secondary control module.

3. The power supply circuit according to claim 1 or 2, characterized in that: The secondary low-voltage output terminals of the secondary low-voltage power supply modules of the at least two power modules are electrically connected to the secondary total output terminal; The power module further includes: a first output diode and a second output diode; After the anode of the first output diode is electrically connected to the cathode of the second output diode, it is electrically connected to the secondary low-voltage output terminal; and After the cathode of the first output diode is electrically connected to the anode of the second output diode, it is electrically connected to the secondary total output terminal.

4. The power supply circuit according to claim 1, characterized in that: In response to the primary control module receiving the power failure signal sent by the rectifier module, the power supply path from the primary low-voltage power supply module to the secondary low-voltage power supply module through the low-voltage transformer is disconnected.

5. The power supply circuit according to claim 1, characterized in that: The thermoelectric standby module comprises: a first thermoelectric module, a second thermoelectric module; and The first thermal electronic module includes: a first thermal electronic module output end, the second thermal electronic module includes: a second thermal electronic module output end, and the first thermal electronic module output end and the second thermal electronic module output end are electrically connected to serve as the thermal electric standby output end.

6. The power supply circuit according to claim 5, characterized in that: The first thermoelectric module includes: a first thermoelectric conversion module, a first voltage conversion circuit; The first thermoelectric conversion module comprises: a first thermoelectric conversion module output end; The first voltage conversion circuit comprises: a first voltage conversion circuit input terminal, a first voltage conversion circuit output terminal; and The output end of the first thermoelectric conversion module is electrically connected to the input end of the first voltage conversion circuit, and the output end of the first voltage conversion circuit serves as the output end of the first thermoelectric module.

7. The power supply circuit according to claim 6, characterized in that: The first thermoelectric conversion module is a first thermoelectric chip; The first thermoelectric chip comprises: a first thermoelectric chip positive output terminal, a first thermoelectric chip negative output terminal; and The positive output end of the first thermoelectric chip serves as the output end of the first thermoelectric conversion module, and the negative output end of the first thermoelectric chip is grounded.

8. The power supply circuit according to claim 7, characterized in that: The first thermoelectric chip further includes: a first thermoelectric chip hot end; and The hot end of the first thermoelectric chip is attached to a first preset position, wherein the first preset position is set at: when the power supply is working, the surface of the heat sink located in the power supply housing and closest to the highest temperature point.

9. The power supply circuit according to claim 6, characterized in that: The first voltage conversion circuit includes: a first transistor, a first resistor, a first mutual inductance coil, and a second mutual inductance coil; and The first electrode of the first transistor is connected in series with the first resistor and then electrically connected to one end of the first mutual inductance coil. One end of the second mutual inductance coil is electrically connected, and the other end of the second mutual inductance coil is electrically connected to the other end of the first mutual inductance coil and serves as the input end of the first voltage conversion circuit. The second pole of the first transistor serves as the output end of the first voltage conversion circuit, and the third pole of the first transistor is grounded.

10. The power supply circuit according to claim 9, characterized in that: One end of the first mutual inductance coil and the other end of the second mutual inductance coil are the same end.

11. The power supply circuit according to claim 6, characterized in that: The first voltage conversion circuit further includes: a second transistor, a second resistor; The first pole of the second transistor is electrically connected to one end of the second resistor, the other end of the second resistor is used to receive a first start signal, the second pole of the second transistor is electrically connected to the first pole of the first transistor, and the third pole of the second transistor is grounded, wherein the first start signal is used to turn on the first voltage conversion circuit.

12. The power supply circuit according to claim 5, characterized in that: The second thermoelectric module includes: a second thermoelectric conversion module, a second voltage conversion circuit; The second thermoelectric conversion module comprises: a second thermoelectric conversion module output end; The second voltage conversion circuit comprises: a second voltage conversion circuit input terminal, a second voltage conversion circuit output terminal; The output end of the second thermoelectric conversion module is electrically connected to the input end of the second voltage conversion circuit, and the output end of the second voltage conversion circuit serves as the output end of the second thermoelectric module.

13. The power supply circuit according to claim 12, characterized in that: The second thermoelectric conversion module is a second thermoelectric chip; The second thermoelectric chip comprises: a second thermoelectric chip positive output terminal and a second thermoelectric chip negative output terminal; The positive output end of the second thermoelectric chip serves as the output end of the second thermoelectric conversion module, and the negative output end of the second thermoelectric chip is grounded.

14. The power supply circuit according to claim 13, characterized in that: The second thermoelectric chip further comprises: a second thermoelectric chip cold end; The cold end of the second thermoelectric chip is attached to a second preset position, wherein the second preset position is set at: a surface of a heat sink in a power supply housing that is closest to a power supply air inlet or a power supply air outlet.

15. The power supply circuit according to claim 12, characterized in that: The second voltage conversion circuit includes: a third transistor, a third resistor, a third mutual inductance coil, and a fourth mutual inductance coil; The first electrode of the third transistor is electrically connected to one end of the third mutual inductance coil after being connected in series with the third resistor, the second electrode of the third transistor is electrically connected to one end of the fourth mutual inductance coil, the other end of the fourth mutual inductance coil is electrically connected to the other end of the third mutual inductance coil and serves as the input end of the second voltage conversion circuit, the second electrode of the third transistor serves as the output end of the second voltage conversion circuit, and the third electrode of the third transistor is grounded.

16. The power supply circuit according to claim 15, characterized in that: One end of the third mutual inductance coil and the other end of the fourth mutual inductance coil are the same end.

17. The power supply circuit according to claim 12, characterized in that: The second voltage conversion circuit further includes: a fourth transistor, a fourth resistor; The first pole of the fourth transistor is electrically connected to one end of the fourth resistor, the other end of the fourth resistor is used to receive a second start signal, the second pole of the fourth transistor is electrically connected to the first pole of the third transistor, and the third pole of the fourth transistor is grounded, wherein the second start signal is used to turn on the second voltage conversion circuit.

18. The power supply circuit according to claim 9 or 15, characterized in that: The first transistor and the third transistor are NPN transistors.

19. The power supply circuit according to claim 1, characterized in that: The power supply module also includes a voltage stabilizing module; the voltage stabilizing input end of the voltage stabilizing module is electrically connected to the thermal power standby output end, and the voltage stabilizing output end of the voltage stabilizing module is electrically connected to the primary low voltage input end.

20. The power supply circuit according to claim 19, characterized in that: The voltage stabilizing module is a low voltage drop linear regulator.

21. The power supply circuit according to claim 19, characterized in that: The power module further includes: a rectifier circuit, an input end of the rectifier circuit is electrically connected to the thermoelectric output port, and an output end of the rectifier circuit is electrically connected to the voltage-stabilizing output port.

22. The power supply circuit according to claim 21, characterized in that: The rectifier circuit comprises: a diode and a capacitor; The cathode of the diode is electrically connected to one end of the capacitor, and the other end of the capacitor is grounded; The anode of the diode serves as the input end of the rectifier circuit, and the cathode of the diode serves as the output end of the rectifier circuit.

23. The power supply circuit according to claim 1, characterized in that: The thermoelectric standby module comprises: a first thermoelectric module, a second thermoelectric module; and The power supply circuit is configured to: in response to the first thermal electronic module working abnormally, send a first shutdown signal to the first thermal electronic module, and send a second start signal to the second thermal electronic module, so that the second thermal electronic module supplies power to the primary control module of the power supply; in response to the second thermal electronic module working abnormally, take preservation measures for the power supply; wherein, the first thermal electronic module working abnormally indicates that the input voltage of the primary control module of the power supply is less than a first voltage threshold, or the temperature difference that causes the first thermoelectric conversion module to work is less than a first temperature difference threshold; the second thermal electronic module working abnormally indicates that the input voltage of the primary control module of the power supply is less than a second voltage threshold, or the temperature difference that causes the second thermoelectric conversion module to work is less than a second temperature difference threshold, the second voltage threshold is higher than the first voltage threshold, and the second temperature difference threshold is higher than the first temperature difference threshold.

24. An electronic device, characterized in that: The electronic device comprises the power supply circuit according to any one of claims 1 to 23.

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