Power supply circuit, method and power consuming system

Abstract

This application provides a power supply circuit, method, and power consumption system, belonging to the field of power supply technology. It includes: a first converter module configured to transform and output input electrical energy; a second converter module connected to the first converter module, configured to transform and output the electrical energy output by the first converter module; and a switch module connected between the first and second converter modules, configured to control the connection between the first and second converter modules, so that when the first and second converter modules are connected, the second converter module can transform the electrical energy output by the first converter module and output it from its output terminal. This application's embodiment, through the cooperation of the first converter module, the second converter module, and the switch module, not only achieves voltage reduction in the circuit but also reduces the size of the packaged circuit board.

Description

Technical Field

[0001] This application relates to the field of power supply technology, and in particular to a power supply circuit, method and power consumption system. Background Technology

[0002] In some power supply circuits, transformers are commonly used as isolation and step-up / step-down components for different voltage output ports. However, transformers are large, and their packaging on circuit boards takes up too much space. Summary of the Invention

[0003] This application provides a power supply circuit, method, and power consumption system to solve the above-mentioned technical problems.

[0004] In a first aspect, this application provides a power supply circuit, including:

[0005] The first converter module is configured to transform the input electrical energy into a voltage output.

[0006] A second converter module is connected to the first converter module, and the second converter module is configured to transform and output the electrical energy output by the first converter module.

[0007] A switching module is connected between the first converter module and the second converter module. The switching module is configured to control the connection between the first converter module and the second converter module, so that when the first converter module and the second converter module are connected, the second converter module can transform the electrical energy output by the first converter module and output it.

[0008] In conjunction with the first aspect, the power supply circuit further includes a first output module, which is connected to the second converter module.

[0009] In conjunction with the first aspect, the power supply circuit further includes a first control module, which is connected to the first converter module and the switching module, and is configured to control the transformer output of the first converter module;

[0010] The first control module is also configured to control the connection state of the switch module in response to a power demand request from the first output module.

[0011] In conjunction with the first aspect, the power supply circuit further includes a second control module, which is connected to the second converter module and the first control module, and is configured to control the transformer output of the second converter module;

[0012] The second control module is also configured to send the power request to the first control module in response to the first output module successfully handshaking with the power-consuming device.

[0013] In conjunction with the first aspect, the power supply circuit further includes a communication module, which connects the first control module and the second control module, and is configured to establish communication between the first control module and the second control module.

[0014] In conjunction with the first aspect, the power supply circuit further includes a comparison module connected to the communication module. The comparison module is configured to send a disconnect signal to the first control module in response to the voltage output by the first converter module being greater than a voltage threshold, so that the first control module controls the switching module to disconnect.

[0015] In conjunction with the first aspect, the first output module includes a handshake module, which is configured to confirm the handshake result between the first output module and the power-consuming device.

[0016] In conjunction with the first aspect, the power supply circuit further includes a second output module, which is connected to the first converter module.

[0017] In conjunction with the first aspect, the power supply circuit further includes a power supply module configured to provide electrical energy to the input terminal of the first converter module.

[0018] A second aspect provides a power supply method applied to a power supply circuit as described in any one of the first aspects, the method comprising:

[0019] Control the first converter module to output the target voltage;

[0020] In response to the target voltage being less than a voltage threshold, the control switch module is closed to connect the first converter module and the second converter module.

[0021] When the first converter module and the second converter module are connected, the second converter module can transform the electrical energy output by the first converter module and then output it.

[0022] In conjunction with the second aspect, the method for controlling the output target voltage of the first converter module includes:

[0023] In response to a power demand, a command to output the target voltage is sent to the first converter module;

[0024] The power request is issued by the second control module after confirming that the first output module and the power-consuming device have successfully shaken hands.

[0025] In conjunction with the second aspect, the method further includes:

[0026] In response to the target voltage being greater than or equal to the voltage threshold, the switching module is controlled to disconnect.

[0027] Thirdly, an electrical system is provided, including a first power port and a power supply circuit as described in any one of the first aspects;

[0028] The first power port is configured to connect to the power supply circuit.

[0029] One of the above technical solutions has the following advantages or beneficial effects:

[0030] This application provides a power supply circuit, including: a first converter module configured to transform input electrical energy into a voltage output; a second converter module connected to the first converter module, configured to transform the electrical energy output from the first converter module into a voltage output; and a switch module connected between the first and second converter modules, configured to control the connection between the first and second converter modules. When the first and second converter modules are connected, the second converter module can transform the electrical energy output from the first converter module into a voltage output. This application, through the cooperation of the first converter module, the second converter module, and the switch module, not only achieves voltage reduction in the circuit but also reduces the size of the packaged circuit board, facilitating installation and transportation. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0033] Figure 1 A schematic diagram of the module connection of the power supply circuit provided in the embodiments of this application;

[0034] Figure 2 A schematic flowchart illustrating the power supply method provided in an embodiment of this application;

[0035] Figure 3 This is a schematic diagram showing the connection between the power supply circuit and the power consumption system provided in the embodiments of this application.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100 - First converter module; 110 - Power supply module; 200 - Second converter module; 300 - First output module; 310 - Handshake module; 320 - Connection terminal; 400 - Switch module; 500 - Second output module; 600 - First control module; 700 - Second control module; 800 - Communication module; 900 - Comparison module. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0039] In the embodiments of this application, "at least one" refers to one or more; "multiple" refers to two or more. In the description of this application, the terms "first," "second," "third," etc., are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0040] References such as “one embodiment” or “some embodiments” as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the terms “comprising,” “including,” “having,” and variations thereof, as used in this specification, mean “including, but not limited to,” unless otherwise specifically emphasized.

[0041] It should be noted that in the embodiments of this application, "and / or" describes the relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. In addition, the character " / ", unless otherwise specified, generally indicates that the associated objects before and after it are in an "or" relationship.

[0042] It should be noted that in the embodiments of this application, "connection" can be understood as electrical connection. The connection between two electrical components can be a direct or indirect connection between the two electrical components. For example, the connection between A and B can be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical components.

[0043] Those skilled in the art will note that the internal structure of a Type-C charger mainly includes an isolation transformer, a buck-boost module, and a control chip with communication handshake functionality. The transformer's primary function is isolation and insulation, enabling the circuit to transition from high voltage to a safety extra-low voltage (SELV) circuit. In some embodiments, the high-voltage side of the Type-C charger draws power from a low-voltage system (less than 60V), such as a battery or photovoltaic panel; this typically includes UPS, grid-connected or off-grid inverters, etc. The current output from the low-voltage system is converted by a converter and then rectified and output through the DC bus to provide power. However, the transformer is relatively large, occupying excessive internal space in the charger during circuit board packaging.

[0044] The specific implementation methods of this application are illustrated below through examples:

[0045] like Figure 1 As shown, this application embodiment provides a power supply circuit, including: a first converter module 100 configured to transform and output input electrical energy; a second converter module 200 connected to the first converter module 100 and configured to transform and output the electrical energy output by the first converter module 100; a first output module 300 connected to the second converter module 200 and configured as a first power supply terminal; and a switch module 400 connected between the first converter module 100 and the second converter module 200, configured to control the connection between the first converter module 100 and the second converter module 200, so that when the first converter module 100 and the second converter module 200 are connected, the second converter module 200 can transform the electrical energy output by the first converter module 100 and output it from the first output module 300. Specifically, the first converter module 100 can output the input electrical energy at a specified voltage, while the second converter module 200 can transform the electrical energy transformed by the first converter module 100 to meet the charging requirements of the first output module 300. It is worth noting that both the first converter module 100 and the second converter module 200 include converters. Converters can convert between different DC voltages; for example, they can convert current and voltage into different stable DC voltages to power different circuit modules; or they can adjust the output voltage according to the load requirements to keep the output voltage stable and unaffected by input voltage fluctuations or load changes.

[0046] In this embodiment, the switch module 400 controls the connection state between the first converter module 100 and the second converter module 200. When the switch module 400 is closed, the first converter module 100 and the second converter module 200 are connected. At this time, the electrical energy transformed by the first converter module 100 is input to the second converter module 200 through the switch module 400. The second converter module 200 further transforms the electrical energy and outputs it through the first output module 300. When the switch module 400 is open, the first converter module 100 and the second converter module 200 are disconnected, and the first output module 300 has no power output. It is worth noting that the switch module 400 can be any one of a relay, an optocoupler, and a MOSFET.

[0047] In this embodiment, the first output module 300 is used to connect to external devices. When the first converter module 100 and the second converter module 200 are connected, the first output module 300 can provide power to the connected external devices to meet charging and other needs.

[0048] It is understood that the embodiments of this application realize multi-stage voltage transformation of electrical energy through the first converter module 100 and the second converter module 200, and realize the output of electrical energy by controlling the first output module 300 through the switch module 400. This not only realizes the step-down output of the circuit, but also reduces the size of the circuit board after packaging. Compared with the step-down output using a transformer, the solution of this application is lower in cost and is easy to install and transport after packaging.

[0049] like Figure 1 As shown in the embodiment of this application, a first control module 600 is also included. The first control module 600 is connected to the first converter module 100 and the switch module 400. The first control module 600 is configured to control the transformer output of the first converter module 100. The first control module 600 is also configured to control the connection state of the switch module 400 in response to a power demand request from the first output module 300. Specifically, the closed and open states of the switch module 400 are both controlled by the first control module 600. When the first output module 300 is connected to an external device, and the external device meets the charging or power consumption conditions, the first control module 600 will receive a corresponding power consumption request. At this time, the first control module 600 sends a closing command to the switch module 400, and the switch module 400 closes according to the closing command. After the first converter module 100 and the second converter module 200 are connected, the first output module 300 can provide power to the external device, thereby meeting the charging or power consumption needs. When the first output module 300 is connected to an external device, but the external device does not meet the charging or power consumption conditions, the first control module 600 will not send a closing command to the switch module 400, and therefore, the first output module 300 will not provide power to the external device.

[0050] Understandably, by setting the first control module 600, when the first output module 300 meets the power requirements, the switch module 400 can be kept closed, thereby enabling the first output module 300 to provide power to external devices; while when the first output module 300 does not meet the power requirements, the first control module 600 can keep the switch module 400 open, thereby preventing the first output module 300 from outputting a voltage that is mismatched with the external devices, which could cause equipment damage or circuit failure.

[0051] like Figure 1 As shown in this embodiment, the circuit further includes a second control module 700, which is connected to the second converter module 200 and the first control module 600. The second control module 700 is configured to control the transformer output of the second converter module 200. The second control module 700 is also configured to send a power request to the first control module 600 in response to a successful handshake between the first output module 300 and the power-consuming device. Specifically, after the first output module 300 is connected to the power-consuming device, the second control module 700 needs to obtain the handshake result between the first output module 300 and the power-consuming device. If the handshake between the first output module 300 and the power-consuming device is successful, the second control module 700 sends the power request of the first output module 300 to the first control module 600 and sends a transformer output instruction to the second converter module 200. After receiving the power request, the first control module 600 controls the switch module 400 to close. If the first output module 300 fails to handshake with the power-consuming equipment, the second control module 700 will not send information or instructions to the first control module 600 and the second converter module 200.

[0052] It is understandable that by setting up the second control module 700 to detect the handshake result of the first output module 300, the first output module 300 is prevented from arbitrarily outputting electrical energy, thereby causing damage to electrical equipment or circuit systems.

[0053] It is worth noting that in some embodiments, only the first control module 600 can be connected to the first converter module 100, the second converter module 200, and the switch module 400 respectively. The first control module 600 obtains the handshake result between the first output module 300 and the power device. When the first output module 300 successfully hands with the power device, the first control module 600 controls the first converter module 100 and the second converter module 200 to perform power conversion, and at the same time controls the switch module 400 to close, thereby realizing the connection between the first converter module 100 and the second converter module 200.

[0054] It is conceivable that the first control module 600 and the second control module 700 provided in the embodiments of this application may include any one or more of microcontrollers, digital signal processors and programmable logic devices, thereby realizing functions such as data monitoring, data processing and sending control commands.

[0055] like Figure 1 As shown in the embodiment of this application, the circuit further includes a communication module 800. The communication module 800 is connected to the first control module 600 and the second control module 700, and is configured to establish communication between the first control module 600 and the second control module 700. Specifically, when the communication protocols between the first control module 600 and the second control module 700 are different, they cannot communicate directly. Therefore, the communication module 800 is needed to assist in realizing the interaction between them. That is, when the second control module 700 determines that the handshake between the first output module 300 and the power-consuming device is successful, it sends the power consumption request of the first output module 300 to the communication module 800. The communication module 800 then forwards the power consumption request sent by the second control module 700 to the first control module 600, thereby realizing the forwarding of information. It is conceivable that the communication module 800 can also be used to isolate communication, thereby preventing the first control module 600 and the second control module 700 from interfering with each other.

[0056] It is worth noting that when the first control module 600 and the second control module 700 meet the communication protocol, the first control module 600 and the second control module 700 can also communicate directly without the communication module 800 acting as an intermediary, thereby improving the efficiency of information exchange.

[0057] It is understandable that by setting up the communication module 800, not only is communication isolation between the first control module 600 and the second control module 700 is achieved, but the interaction efficiency between the first control module 600 and the second control module 700 is also improved.

[0058] like Figure 1 As shown in the embodiment of this application, the circuit further includes a comparison module 900, which is connected to the communication module 800. The comparison module 900 is configured to send a disconnect signal to the first control module 600 in response to the voltage output by the first converter module 100 being greater than a voltage threshold, so that the first control module 600 controls the switch module 400 to disconnect. Specifically, the comparison module 900 includes a comparator, which is used to compare the magnitudes of the voltage or current input to two input terminals and output a high-level signal or a low-level signal according to the magnitude relationship of the two input signals to indicate the comparison result. The comparison module 900 provided in this embodiment of the application is used to convert the target voltage V output by the first converter module 100 into a voltage threshold. BUS Compared with the voltage threshold, if the target voltage VBUS If the voltage exceeds the threshold voltage, the comparison module 900 outputs a corresponding high or low level. The communication module 800 then sends a disconnect signal to the first control module 600 based on the received high or low level. The first control module 600 then sends a disconnect command to the switch module 400 based on the received disconnect signal, causing the control switch module 400 to disconnect. When the voltage threshold is 60V, the target voltage V output by the first converter module 100 is... BUS Compared to 60V, if the target voltage V BUS If the voltage is greater than 60V, the comparator module 900 outputs a disconnect signal; if the target voltage V BUS If the voltage is less than or equal to 60V, no signal will be output.

[0059] It is understandable that the comparison module 900 is used to determine the target voltage V output by the first converter module 100. BUS This avoids the target voltage V BUS Excessive voltage can damage the second converter module 200 when it is input, thus protecting the circuit and related components.

[0060] like Figure 1 As shown in this embodiment, the first output module 300 includes a handshake module 310 and a connection terminal 320. The connection terminal 320 is configured to connect to the interface of the power device, and the handshake module 310 is configured to confirm the handshake result between the first output module 300 and the power device. Specifically, the handshake module 310 is used to control the signal interaction between the two communicating parties. The handshake module 310 realizes the status confirmation between the two communicating parties through request and acknowledgment, generally including: a request phase, an acknowledgment phase, and signal cancellation. In the request phase, the sender raises the request signal after preparing the data to notify the receiver that the data is ready. In the acknowledgment phase, the receiver latches the data after detecting a valid request, completes the processing, and raises the acknowledgment signal. Finally, the sender cancels the request after receiving the acknowledgment, and the receiver subsequently cancels the acknowledgment, completing a complete handshake cycle.

[0061] In this embodiment, after the first output module 300 and the power-consuming device are connected, the first output module 300, as the sender, sends a request signal to the power-consuming device through the handshake module 310. The power-consuming device, as the receiver, latches data after detecting a valid request signal and sends back a response signal. Upon receiving the response signal, the handshake module 310 withdraws the request, and the power-consuming device withdraws its response, thus the handshake between the first output module 300 and the power-consuming device is successful. Therefore, the first output module 300 can provide power to the power-consuming device. It is worth noting that if the receiver does not respond after the first output module 300 sends the request signal, or if the response signal sent by the receiver does not meet the corresponding conditions, the handshake between the first output module 300 and the power-consuming device fails, and the first output module 300 does not provide power to the power-consuming device.

[0062] In some embodiments of this application, the first output module 300 and the power-consuming device can act as both sender and receiver. Specifically, after the first output module 300, as the sender, sends a request signal to the power-consuming device via the handshake module 310, the power-consuming device, as the responder, sends a corresponding response signal back to the handshake module 310. Simultaneously, the power-consuming device also sends a request signal to the handshake module 310, and the handshake module 310, upon receiving the request signal, sends a corresponding response signal back. Only when both the handshake module 310 and the power-consuming device successfully verify the response signals can the first output module 300 and the power-consuming device determine that the handshake has succeeded. Otherwise, if the response signal from either party fails verification, it indicates that the handshake between the first output module 300 and the power-consuming device has failed. It is conceivable that handshake protocols meeting the conditions include any one of USB PD (Power Delivery), QC 2.0 (QuickCharge 2.0), and VOOC (Voltage Open Loop Multi-step Constant-Current Charging).

[0063] It is understandable that by setting up the handshake module 310 to detect the power supply protocol between the first output module 300 and the power-consuming equipment, the first output module 300 is prevented from supplying power to the unqualified power-consuming equipment without verification, thereby preventing damage to the power supply circuit or the power-consuming equipment and improving the safety of the circuit.

[0064] like Figure 1As shown, in this embodiment, a second output module 500 is also included. The second output module 500 is connected to the first converter module 100 and is configured as a second power supply terminal. Specifically, the second output module 500 is connected to the output terminal of the first converter module 100 and is used to provide power to other electrical devices or circuits. It is conceivable that the second output module 500 can also be equipped with a corresponding converter and a handshake module 310. The converter is used to increase or decrease the voltage of the power output from the first converter module 100 to meet the needs of other electrical devices or circuits; while the handshake module 310 is used to verify other electrical devices or circuits when the second output module 500 is connected to them, thereby preventing the second output module 500 from providing power to unqualified electrical devices or circuits. It is worth noting that the second output module 500 is connected between the first converter module 100 and the switch module 400, therefore the output of the second output module 500 is not controlled by the switch module 400. Therefore, the second output module 500 can continuously output power.

[0065] It is understandable that by setting the second output module 500, a power supply port that can continuously output power without being controlled by the switch module 400 is provided to the circuit, thereby ensuring that the circuit can continuously provide power to the corresponding electrical equipment or circuit without being disturbed by changes in components.

[0066] like Figure 1 As shown, in this embodiment, a power supply module 110 is also included, which is configured to provide electrical energy to the input terminal of the first converter module 100. Specifically, the output terminal of the power supply module 110 is connected to the input terminal of the first converter module 100, thereby providing a stable power supply to the first converter module 100, ensuring that the first converter module 100 has sufficient electrical energy to supply to the first output module 300 and the second output module 500, thus enabling the corresponding electrical equipment or circuit to operate stably.

[0067] In this embodiment, the power supply module 110 includes any one of an energy storage unit, a photovoltaic unit, and a power grid, while the energy storage unit includes any one of a battery pack, a battery cluster, and a battery container. It is conceivable that, to ensure the power supply module 110 can provide sufficient electrical energy to the first converter module 100, a corresponding rectifier unit, converter unit, or conversion unit can be added between the power supply module 110 and the first converter module 100, depending on the type of power supply module 110. This allows different types of power supply modules 110 to output electrical energy usable by the first converter module 100 after rectification, conversion, or conversion.

[0068] Understandably, by setting up a power supply module, the first converter module 100 can obtain sufficient power to meet the output requirements of the first output module 300 and the second output module 500 in the circuit, while also ensuring that the second output module 500 has a stable power output, thus improving the stability of the circuit.

[0069] In summary, the power supply circuit provided in this application embodiment achieves multi-stage voltage transformation of electrical energy through the first converter module 100 and the second converter module 200, and controls the output of electrical energy from the first output module 300 through the switch module 400, thus realizing the step-down output of the circuit. The first control module 600 can control the switch module 400 to remain closed or open, allowing the first output module 300 to selectively provide power according to the condition of the electrical equipment. The second control module 700 detects the handshake result of the first output module 300, preventing the first output module 300 from supplying power to unsuitable electrical equipment. The communication module 800 isolates communication between the first control module 600 and the second control module 700. The comparison module 900 is used to determine the target voltage V output by the first converter module 100. BUS This provides protection for the circuit and its components; the handshake module 310 enables the detection of the power supply protocol between the first output module 300 and the power-consuming equipment, improving circuit safety; the second output module 500 provides the circuit with a power supply port that can continuously output power without being controlled by the switch module 400; the power supply module ensures that the first converter module 100 receives sufficient power, thus meeting the output requirements of the first output module 300 and the second output module 500 in the circuit; therefore, the technical solution provided in this application reduces the size of the circuit board after packaging. Compared with the traditional power supply circuit that uses a transformer for step-down output, the solution in this application is lower in cost and easier to install and transport after packaging.

[0070] like Figure 2 As shown, this application embodiment also provides a power supply method, applied to the power supply circuit in any of the above embodiments, the method comprising:

[0071] S1: Controls the first converter module 100 to output the target voltage.

[0072] The specific methods and steps include:

[0073] After confirming a successful handshake with the power-consuming equipment, the handshake module 310 of the first output module 300 sends a handshake success signal to the second control module 700. Based on the successful handshake result, the second control module 700 sends a power consumption request to the first control module 600 through the communication module 800. After receiving the power consumption request, the first control module 600 sends an instruction to the first converter module 100 to output the target voltage. After receiving the instruction, the first converter module 100 outputs the corresponding target voltage.

[0074] S2: In response to the target voltage being less than the voltage threshold, the control switch module 400 is closed to connect the first converter module 100 and the second converter module 200; wherein, when the first converter module and the second converter module are connected, the second converter module can transform the electrical energy output by the first converter module and output it.

[0075] The specific methods and steps include:

[0076] After the first converter module 100 outputs the corresponding target voltage, the first control module 600 detects the target voltage. If it is determined that the target voltage is less than the voltage threshold, it sends a closing command to the switch module 400. After receiving the closing command, the switch module 400 closes. At this time, the first converter module 100 is connected to the second converter module 200. The electrical energy output by the first converter module 100 can be transformed by the second converter module 200 and then output through the first output module 300, thereby enabling the first output module 300 to provide electrical energy to the electrical equipment.

[0077] It is worth noting that, in the embodiments of this application, the method further includes:

[0078] In response to a target voltage being greater than or equal to a voltage threshold, the control switch module 400 is disconnected.

[0079] The specific methods and steps include:

[0080] The comparison module 900 compares the target voltage and the voltage threshold as inputs. When the target voltage is greater than or equal to the voltage threshold, it sends a disconnect signal to the first control module 600 through the communication module 800. The first control module 600 sends a disconnect command to the switch module 400 according to the disconnect signal. After receiving the disconnect command, the switch module 400 disconnects, thereby preventing the target voltage greater than the voltage threshold from being input into the subsequent circuit.

[0081] It can be conceivable that, through configuration, the comparison module 900 can output a corresponding high level when the target voltage is greater than or equal to the voltage threshold, and output a corresponding low level when the target voltage is less than the voltage threshold; the communication module 800 sends an open or closed signal to the first control module 600 according to the high or low level of the output of the comparison module 900.

[0082] In summary, the power supply method provided in this application embodiment achieves multi-stage voltage transformation of electrical energy through the first converter module 100 and the second converter module 200, and controls the output of electrical energy from the first output module 300 through the switch module 400, thus realizing the step-down output of the circuit. The first control module 600 can control the switch module 400 to remain closed or open, allowing the first output module 300 to selectively provide power according to the condition of the electrical equipment. The second control module 700 detects the handshake result of the first output module 300, preventing the first output module 300 from supplying power to unsuitable electrical equipment. The communication module 800 isolates communication between the first control module 600 and the second control module 700. The comparison module 900 is used to determine the target voltage V output by the first converter module 100. BUS This provides protection for the circuit and corresponding components; by setting up the handshake module 310, the power supply protocol between the first output module 300 and the power-consuming equipment is detected, which improves the safety of the circuit; therefore, the method provided in this application embodiment reduces the size of the circuit board after packaging. Compared with the traditional power supply circuit using a transformer for step-down output, the solution of this application is lower in cost and easier to install and transport after packaging.

[0083] like Figure 3 As shown, this application embodiment also provides a power supply system, including a first power supply port and a power supply circuit as provided in any of the above embodiments; the first power supply port is configured to connect to a first output module. It should be noted that the functions and beneficial effects of the power supply circuit provided in this application embodiment have been described in any of the above embodiments, and will not be repeated here.

[0084] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Although this application has disclosed preferred embodiments as above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A power supply circuit, characterized in that, include: The first converter module is configured to transform the input electrical energy into a voltage output. A second converter module is connected to the first converter module, and the second converter module is configured to transform and output the electrical energy output by the first converter module. A switching module is connected between the first converter module and the second converter module. The switching module is configured to control the connection between the first converter module and the second converter module, so that when the first converter module and the second converter module are connected, the second converter module can transform the electrical energy output by the first converter module and output it.

2. The power supply circuit according to claim 1, characterized in that, The power supply circuit also includes a first output module, which is connected to the second converter module.

3. The power supply circuit according to claim 2, characterized in that, The power supply circuit also includes a first control module, which is connected to the first converter module and the switching module. The first control module is configured to control the transformer output of the first converter module. The first control module is also configured to control the connection state of the switch module in response to a power demand request from the first output module.

4. The power supply circuit according to claim 3, characterized in that, The power supply circuit further includes a second control module, which is connected to the second converter module and the first control module. The second control module is configured to control the transformer output of the second converter module. The second control module is also configured to send the power request to the first control module in response to the first output module successfully handshaking with the power-consuming device.

5. The power supply circuit according to claim 4, characterized in that, The power supply circuit also includes a communication module, which connects the first control module and the second control module and is configured to establish communication between the first control module and the second control module.

6. The power supply circuit according to claim 5, characterized in that, The power supply circuit further includes a comparison module connected to the communication module. The comparison module is configured to send a disconnect signal to the first control module in response to the voltage output by the first converter module being greater than a voltage threshold, so that the first control module controls the switching module to disconnect.

7. The power supply circuit according to claim 2, characterized in that, The first output module includes a handshake module, which is configured to confirm the handshake result between the first output module and the power device.

8. The power supply circuit according to claim 1, characterized in that, The power supply circuit also includes a second output module, which is connected to the first converter module.

9. The power supply circuit according to claim 1, characterized in that, The power supply circuit also includes a power supply module configured to provide electrical energy to the input terminal of the first converter module.

10. A power supply method, characterized in that, Applied to a power supply circuit as described in any one of claims 1-9, the method comprises: Control the first converter module to output the target voltage; In response to the target voltage being less than a voltage threshold, the control switch module is closed to connect the first converter module and the second converter module. When the first converter module and the second converter module are connected, the second converter module can transform the electrical energy output by the first converter module and then output it.

11. The power supply method according to claim 10, characterized in that, The method for controlling the output target voltage of the first converter module includes: In response to a power demand, a command to output the target voltage is sent to the first converter module; The power request is issued by the second control module after confirming that the first output module and the power-consuming equipment have successfully shaken hands.

12. The power supply method according to claim 10, characterized in that, The method further includes: In response to the target voltage being greater than or equal to the voltage threshold, the switching module is controlled to disconnect.

13. An electrical system, characterized in that, It includes a first power input port and a power supply circuit as described in any one of claims 1-9; The first power port is configured to connect to the power supply circuit.

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