A power supply circuit and system
By designing power supply switch modules and load switch modules in the power supply circuit, reliable switching between multiple power sources is achieved, solving the problem of low power supply reliability in traditional power distribution systems, improving system stability and reducing energy consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI YINGHENG ELECTRONICS
- Filing Date
- 2025-04-15
- Publication Date
- 2026-06-23
Smart Images
Figure CN224401211U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power supply technology, and in particular to a power supply circuit and system. Background Technology
[0002] In modern electronic systems, a continuous and stable power supply is a key factor in ensuring system reliability. With technological advancements, more and more products require dual or even multiple power supplies, as well as the control of multiple power supply loops within a single system. Currently, the common practice is to install distribution switches on the power lines in each loop direction to achieve the corresponding functions. However, this traditional power distribution system has relatively low reliability. Utility Model Content
[0003] This utility model provides a power supply circuit and system to solve the problem of low power supply reliability in traditional power distribution systems.
[0004] This utility model provides a power supply circuit, including: at least two power supply switch modules and at least one load switch module;
[0005] The input terminal of the power supply switch module is connected to a power supply, the output terminal of the power supply switch module is connected to the input terminal of the load switch module, and the output terminal of the load switch module is used to connect a load; at least two of the power supply switch modules are connected to different power supplies.
[0006] Optionally, it may also include: at least two first drive modules and at least one second drive module;
[0007] The first drive module is connected to the control terminal of the power supply switch module and is used to control the conduction state of the power supply switch module;
[0008] The second drive module is connected to the control terminal of the load switch module and is used to control the conduction state of the load switch module.
[0009] Optionally, it further includes: a control module, which is connected to the first drive module and the second drive module respectively. The control module is used to control at least one of the first drive modules to output a conduction control signal to the corresponding power supply switch module to turn on the corresponding power supply switch module based on the target power supply mode, and to control at least one of the second drive modules to turn on and output a conduction control signal to the load switch module to turn on the load switch module.
[0010] Optionally, the control module includes: at least two first detection units and a control unit, wherein the first detection units are connected to the input terminal of the corresponding power supply switch module, and the output terminal of the first detection unit is connected to the control unit.
[0011] The first detection unit is used to detect the voltage at the input terminal of the corresponding power supply switch module;
[0012] The control unit is used to determine the target power supply mode based on the voltage at the input terminals of at least two of the power supply switch modules, and based on the target power supply mode, control at least one of the first drive modules to output a conduction control signal to the corresponding power supply switch module.
[0013] Optionally, the control module further includes a second detection unit, the input terminal of which is connected to the input terminal of the load switch module, and the output terminal of which is connected to the control unit. The second detection unit is used to detect the voltage at the input terminal of the load switch module.
[0014] The control unit is configured to output a shutdown control signal to the power supply switch module and the load switch module when the voltage at the input terminal of the load switch module is equal to the voltage at the input terminal of the power supply switch module, so as to shut down the power supply switch module and the load switch module.
[0015] Optionally, the power supply switch module and the load switch module each include power devices.
[0016] Optionally, the power device includes at least two switching devices, and the switching devices in the same power device are connected in parallel.
[0017] Optionally, the switching device of the load switch module includes a parasitic diode, the positive terminal of which is connected to the input terminal of the load switch module, and the negative terminal of which is connected to the load.
[0018] Optionally, at least two of the power supply types are different.
[0019] According to another aspect of the present invention, a power supply system is also provided to implement the power supply circuit described in any embodiment of the present invention.
[0020] The technical solution of this utility model embodiment, by setting at least two power supply switch modules and at least one load switch module, with the at least two power supply switch modules connected to different power sources, ensures that even if one power source fails, the other power sources can continue to supply power to the system, thereby enhancing the system's reliability and stability. This utility model embodiment embodiment solves the problem of low power supply reliability in power distribution switch systems, enabling the selection and switching of power sources according to actual needs, improving power switching speed, reducing energy consumption, and minimizing unnecessary hardware configuration, thus reducing costs.
[0021] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is a schematic diagram of a power supply circuit provided in an embodiment of the present utility model;
[0024] Figure 2 This is a schematic diagram of another power supply circuit provided in an embodiment of the present utility model;
[0025] Figure 3 This is a schematic diagram of another power supply circuit provided in this embodiment of the utility model;
[0026] Figure 4 This is a schematic diagram of a power supply system provided in an embodiment of the present invention. Detailed Implementation
[0027] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0028] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0029] Figure 1 This is a schematic diagram of a power supply circuit provided by an embodiment of the present invention. This embodiment is applicable to scenarios where multiple power sources are used to supply power to a load. Figure 1 As shown, the circuit includes at least two power supply switch modules 101 and at least one load switch module 102;
[0030] The input terminal of the power supply switch module 101 is connected to the power supply 103, and the output terminal of the power supply switch module 101 is connected to the input terminal of the load switch module 102. The output terminal of the load switch module 102 is used to connect the load 104. At least two power supply switch modules 101 are connected to different power supplies 103.
[0031] The power supply switch module 101 and load switch module 102 are used to control the transmission and distribution of electrical energy. Each module may contain one or more switching elements, such as transistors or field-effect transistors, offering fast response, flexible control, low energy consumption, and small size and weight. The power supply 103 provides power to electronic devices, appliances, or other loads, such as DC power supplies and batteries. When the power supply switch module 101 and load switch module 102 are turned on, electrical energy from the input to the output of the power supply 103 flows, thus powering the load 104. Conversely, when the power supply switch module 101 and / or load switch module 102 are turned off, the power supply is cut off.
[0032] Specifically, the power supply method can be determined based on the power supply 103. By controlling at least one power supply switch module 101 and a load switch module 102, electrical energy is transferred from the power supply 103 to the power supply switch module 101. The power supply switch module 101 is responsible for controlling the on / off state of the power supply. When the power supply switch module 101 is on, it can deliver the electrical energy output from the corresponding connected power supply 103 to the load switch module 102. The load switch module 102 further controls the transmission of electrical energy, ultimately delivering the electrical energy to the load 104 to provide the required power to the load 104. Alternatively, by controlling at least two power supply switch modules 101 to be on and controlling the load switch module 102 to be off, electrical energy can be transferred from one power supply 103 to another power supply 103, realizing the power supply of one power supply 103 to another power supply 103.
[0033] The technical solution of this utility model embodiment, by setting at least two power supply switch modules and at least one load switch module, with the at least two power supply switch modules connected to different power sources, ensures that even if one power source fails, the other power sources can continue to supply power to the system, thereby enhancing the system's reliability and stability. This utility model embodiment solution solves the problem of low power supply reliability in traditional power distribution switch systems, enabling the selection and switching of power sources according to actual needs, improving power switching speed, reducing energy consumption, and minimizing unnecessary hardware configuration, thus reducing costs.
[0034] Figure 2 This is a schematic diagram of another power supply circuit provided in an embodiment of the present invention. In some optional embodiments of the present invention, such as… Figure 2 As shown, it also includes: at least two first drive modules 105 and at least one second drive module 106;
[0035] The first drive module 105 is connected to the control terminal of the power supply switch module 101 and is used to control the conduction state of the power supply switch module 101.
[0036] The second drive module 106 is connected to the control terminal of the load switch module 102 and is used to control the conduction state of the load switch module 102.
[0037] Optionally, the first drive module 105 is connected to the power supply switch module 101 in a one-to-one correspondence.
[0038] Optionally, the second drive module 106 is connected to the load switch module 102 in a one-to-one correspondence.
[0039] The first drive module 105 generates a first drive signal to drive the corresponding connected power supply switch module 101, thereby controlling the conduction state of the corresponding connected power supply switch module 101. The second drive module 106 generates a second drive signal to drive the corresponding connected load switch module 102, thereby controlling the conduction state of the corresponding connected load switch module 102. The first drive module 105 is connected to the control terminal of the power supply switch module 101, and the first drive signal generated by the first drive module 105 can be directly transmitted to the control terminal of the power supply switch module 101. The power supply switch module 101 controls its on / off state through the first drive signal sent by the first drive module 105. The second drive module 106 is connected to the control terminal of the load switch module 102. If the load 104 requires power, the second drive module 106 sends a second drive signal to turn on the load switch module 102, thereby supplying power to the load 104; if the load 104 does not require power, the second drive module 106 sends a second drive signal to turn off the load switch module 102, stopping the power supply to the load 104. It enables precise control of power supply and effective management of load.
[0040] Some alternative embodiments of this utility model are further referenced. Figure 2 It also includes a control module 107, which is connected to the first drive module 105 and the second drive module 106 respectively. The control module 107 is used to control at least one first drive module 105 to output a conduction control signal to the corresponding power supply switch module 101 to make the corresponding power supply switch module 101 conduct, and to control at least one second drive module 106 to conduct and output a conduction control signal to the load switch module 102 to make the load switch module 102 conduct.
[0041] The control module 107 can send control signals according to the target power supply mode. The first drive module 105 and the second drive module 106 are respectively connected to the control module 107, receive control signals from the control module 107, and drive the corresponding switch modules according to the control signals. The target power supply mode refers to the power supply state or mode required by the circuit. In some embodiments, the target power supply mode can be received from the outside by the control module 107; in other embodiments, the target power supply mode is determined by the control module 107 based on the voltage of some nodes in the power supply circuit. For example, the control module 107 can select a suitable power supply 103 to supply power to the load based on the voltage of the power supply 103 connected to at least two power supply switch modules 101. The conduction control signal is used to control the conduction state of the switch modules. When the drive module receives the conduction control signal from the control module 107, it can turn on the corresponding switch module, that is, allow current to flow. The aforementioned switch modules can be power supply switch modules 101 or load switch modules 102. The power supply switch module 101 turns on after receiving a conduction control signal from at least one first drive module 105 and a conduction control signal from the control module 107, thus selecting the power supply and controlling the transmission of electrical energy. The load switch module 102 turns on after receiving a conduction control signal from at least one second drive module 106, connecting the power supply circuit to the load 104 and providing power to the load 104. Specifically, the control module 107 controls the conduction of the power supply switch module 101 through the first drive module 105 according to the target power supply method to select the power supply; at the same time, it controls the conduction of the load switch module 102 through the second drive module 106 to connect the power supply circuit to the load 104.
[0042] The technical solution of this utility model, by setting up a control module, a first drive module, and a second drive module, allows the control module to select and control the corresponding power supply switch module and load switch module according to different target power supply methods, in order to adapt to different working modes and load requirements. Through precise control, it can ensure that the power supply switch module and load switch module are turned on or off at appropriate times, reducing unnecessary power loss and heat generation, and extending the service life of the equipment.
[0043] Figure 3 This is a schematic diagram of another power supply circuit provided by an embodiment of the present utility model. In some optional embodiments of the present utility model, such as... Figure 3 As shown, the control module 107 includes at least two first detection units 1071 and a control unit 1072. The first detection units 1071 are connected to the input terminals of the corresponding power supply switch modules 101, and the output terminals of the first detection units 1071 are connected to the control unit 1072.
[0044] The first detection unit 1071 is used to detect the voltage at the input terminal of the corresponding power supply switch module 101;
[0045] The control unit 1072 is used to determine the target power supply mode based on the voltage at the input terminals of at least two power supply switch modules 101, and based on the target power supply mode, control at least one first drive module 105 to output a conduction control signal to the corresponding power supply switch module 101.
[0046] Optionally, the first detection unit 1071 is connected to a power supply switch module 101 in a one-to-one correspondence. The first detection unit 1071 detects the voltage at the input terminal of the corresponding power supply switch module 101. At least two first detection units 1071 are connected to the input terminals of different power supply switch modules 101, and the first detection unit 1071 measures the voltage of the power supply 103. Figure 3Taking the control module 107, which includes two power supply switch modules 101 and two first detection units 1071, as an example, one first detection unit 1071 is connected to the input terminal A of one power supply switch module 101 to obtain the voltage at input terminal A; the other first detection unit 1071 is connected to the input terminal B of the other power supply switch module 101 to obtain the voltage at input terminal B. The control unit 1072 is connected to the output terminal of the first detection unit 1071 and receives the detection results from the first detection unit 1071. The control unit 1071 determines the power supply method based on the voltages at the input terminals of at least two power supply switch modules 101. Based on the determined target power supply method, the control unit 1072 sends a command to at least one first drive module 105, causing it to output a conduction control signal to the corresponding power supply switch module 101, turning on the power supply switch module 101 and allowing current to flow to power the load 104. This allows for the selection of the power supply path according to the actual power supply conditions, ensuring a stable power supply to the load.
[0047] Specifically, when there is voltage at input terminal A of power supply switch module 101 and no voltage at input terminal B, or when there is no voltage at input terminal A of power supply switch module 101 and voltage at input terminal B, the power supply circuit operates on a single power supply. In this case, control unit 1072 controls the power supply switch module 101 with the corresponding voltage to conduct, and the load switch module 102 to conduct, supplying power to load 104. If there is voltage at both input terminals A and B of power supply switch module 101, the power supply circuit operates on a dual power supply. In this case, either power supply can be arbitrarily configured as the main power supply. If the voltage at input terminal A of power supply switch module 101 is higher than the voltage at input terminal B of power supply switch module 101, then the power supply 103 connected to input terminal A of power supply switch module 101 becomes the main power supply. At this time, the control unit 1072 controls the first drive module 105 to send a conduction control signal to the corresponding power supply switch module 101 at input terminal A, thereby turning on the corresponding power supply switch module 101. Simultaneously, the control unit 1072 controls the second drive module 106 to output a conduction control signal to the load switch module 102, causing the load switch module 102 to conduct and supply power to the load 104. Alternatively, by controlling at least two power supply switch modules 101 to conduct and controlling the load switch module 102 to turn off, the input terminal A of the power supply switch module 101 is connected to a power supply 103 to charge another power supply 103. If the voltage at input terminal B of the power supply switch module 101 is higher than the voltage at input terminal A, then the power supply 103 connected to input terminal B of the power supply switch module 101 serves as the main power supply. At this time, the control unit 1072 controls the first drive module 105, which is connected to the input terminal B of the corresponding power supply switch module, to send a conduction control signal to the corresponding power supply switch module 101, thereby turning on the corresponding power supply switch module 101. Simultaneously, the control unit 1072 controls the second drive module 106 to output a conduction control signal to the load switch module 102, so that the load switch module 102 turns on and supplies power to the load 104. Alternatively, by controlling at least two power supply switch modules 101 to turn on and controlling the load switch module 102 to turn off, the input terminal B of the power supply switch module 101 is connected to a power supply 103 to charge another power supply 103.
[0048] In some optional embodiments of this utility model, the control module 107 further includes a second detection unit 1073. The input terminal of the second detection unit 1073 is connected to the input terminal of the load switch module 102, and the output terminal of the second detection unit 1073 is connected to the control unit 1072. The second detection unit 1072 is used to detect the voltage at the input terminal of the load switch module 102.
[0049] The control unit 1072 is used to control the output of a shutdown control signal to the power supply switch module 101 and the load switch module 102 when the voltage at the input terminal of the load switch module 102 is equal to the voltage at the input terminal of the power supply switch module 101, so as to shut down the power supply switch module 101 and the load switch module 102.
[0050] Optionally, the second detection unit 1073 is connected to the load switch module 102 in a one-to-one correspondence. The second detection unit 1073 detects the voltage at the input terminal of the load switch module 102, i.e., as shown... Figure 3 The voltage at input terminal C of the load switch module 102 is shown. The control unit 1072 is connected to the output terminal of the second detection unit 1073 and receives the detection results from the second detection unit 1073. All power supply switch modules 101 are in the off state. The voltage at input terminal C of the load switch module 102 is equal to the voltage at the input terminal of the power supply switch module 101, indicating that although the power supply switch module 101 is turned off, current is still flowing through it, which can be judged as an abnormality in the power supply circuit. At this time, the control unit 1072 will actively send a shutdown control signal to the power supply switch module 101 and the load switch module 102, causing them to shut down. This prevents accidental current flow, thereby ensuring the safety and stability of the circuit.
[0051] Some alternative embodiments of this utility model are further referenced. Figure 3 The power supply switch module 101 and the load switch module 102 each include a power device 1011.
[0052] The power device 1011, used for power conversion and control, is a core component of the power supply switch module 101 and the load switch module 102. The power device can be a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor), SiC (Silicon Carbide) device, IGBT (Insulated Gate Bipolar Transistor), GaN (Gallium Nitride) device, thyristor, or smart high-side transistor, etc. Furthermore, both the power supply switch module 101 and the load switch module 102 exhibit unidirectional conductivity when switched off.
[0053] Some alternative embodiments of this utility model are further referenced. Figure 3 The power device 1011 includes at least two switching devices, and the switching devices in the same power device 1011 are connected in parallel.
[0054] Switching devices refer to semiconductor devices capable of rapidly switching between on and off states, such as MOSFETs, IGBTs, GaN devices, thyristors, and intelligent high-side transistors. They offer advantages such as fast response, flexible control, low power consumption, and small size and weight. The power device 1011 includes at least two switching devices; the specific number can be determined based on the current in the power supply circuit. Connecting multiple switching devices in parallel increases the overall current handling capacity of the circuit. In parallel connections, each switching device shares a portion of the current, thereby improving the current capacity and reliability of the entire power device 1011, thus enhancing the overall reliability of the circuit.
[0055] Some alternative embodiments of this utility model are further referenced. Figure 3 The switching device of the load switch module 102 includes a parasitic diode. The positive terminal of the parasitic diode is connected to the input terminal of the load switch module 102, and the negative terminal of the parasitic diode is connected to the load 104.
[0056] In switching devices, such as MOSFETs, a parasitic diode naturally forms within their internal structure. The anode of this parasitic diode is connected to the input terminal of the load switching module 102, and the cathode is connected to one end of the load 104, i.e., the input terminal of the load 104. When the switching device is off, if the load current attempts to flow in reverse, the parasitic diode will conduct, preventing sudden current surges from damaging the device and the load 104. Simultaneously, the switching power device in the power supply switching module 101 also includes a parasitic diode. The anode of this parasitic diode is connected to the output terminal of the power supply switching module 101, and the cathode is connected to the power supply 103. The parasitic diode protects the switching device from damage caused by voltage spikes during switching.
[0057] Some alternative embodiments of this utility model are further referenced. Figure 3 At least two power supplies 103 are of different types.
[0058] The power supply 103 can be of various types; at least two power supply 103 types can be power sources and batteries, and the power source can be a DC power source. The appropriate power source type can be selected according to the application scenario. By controlling the on / off state of the power supply switch module 101 and the load switch module 102, the power supply 103 can not only supply power to the load 104, but also charge the other power supply 103 by controlling the on / off state of the power supply switch module 101. For example, if one power supply 103 is a DC power source and the other is a battery, then the DC power source can charge the battery by controlling the on / off state of at least two power supply switch modules 101 and the off / off state of the load switch module 102. Alternatively, the battery can discharge when the DC power source is disconnected by controlling the on / off state of at least two power supply switch modules 101 and the off / off state of the load switch module 102.
[0059] The technical solution of this utility model embodiment, by setting up a first detection unit, a second detection unit, and a control unit, determines the target power supply mode based on the voltage at the input terminal of the power supply switch module. According to the power supply mode, the control unit controls the corresponding power supply switch module and load switch module to conduct, supplying power to the load. Through voltage detection and control, it can be ensured that the power supply switch module and load switch module conduct or disconnect at appropriate times, reducing unnecessary power loss and heat generation. The power supply switch module and load switch module use power devices, and the power devices include at least two switching devices, improving power switching speed, reducing energy consumption, reducing unnecessary hardware configuration, and thus reducing costs.
[0060] Figure 4 This is a schematic diagram of a power supply system provided in an embodiment of the present invention, as shown below. Figure 4 As shown, the power supply system 201 includes the power supply circuit described in any of the above embodiments.
[0061] The power supply system provided in this embodiment of the present invention has the beneficial effects of the power supply circuit described in any of the above embodiments.
[0062] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.
[0063] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. A power supply circuit, characterized in that, include: At least two power supply switch modules and at least one load switch module; The input terminal of the power supply switch module is connected to a power supply, the output terminal of the power supply switch module is connected to the input terminal of the load switch module, and the output terminal of the load switch module is used to connect a load; at least two of the power supply switch modules are connected to different power supplies.
2. The power supply circuit according to claim 1, characterized in that, Also includes: At least two first drive modules and at least one second drive module; The first drive module is connected to the control terminal of the power supply switch module and is used to control the conduction state of the power supply switch module; The second drive module is connected to the control terminal of the load switch module and is used to control the conduction state of the load switch module.
3. The power supply circuit according to claim 2, characterized in that, Also includes: A control module is connected to the first drive module and the second drive module respectively. The control module is used to control at least one of the first drive modules to output a conduction control signal to the corresponding power supply switch module to turn on the corresponding power supply switch module based on the target power supply mode, and to control at least one of the second drive modules to turn on and output a conduction control signal to the load switch module to turn on the load switch module.
4. The power supply circuit according to claim 3, characterized in that, The control module includes at least two first detection units and a control unit. The first detection units are connected to the input terminals of the corresponding power supply switch modules, and the output terminals of the first detection units are connected to the control unit. The first detection unit is used to detect the voltage at the input terminal of the corresponding power supply switch module; The control unit is used to determine the target power supply mode based on the voltage at the input terminals of at least two of the power supply switch modules, and based on the target power supply mode, control at least one of the first drive modules to output a conduction control signal to the corresponding power supply switch module.
5. The power supply circuit according to claim 3, characterized in that, The control module further includes a second detection unit, the input terminal of which is connected to the input terminal of the load switch module, and the output terminal of which is connected to the control unit. The second detection unit is used to detect the voltage at the input terminal of the load switch module. The control unit is configured to output a shutdown control signal to the power supply switch module and the load switch module when the voltage at the input terminal of the load switch module is equal to the voltage at the input terminal of the power supply switch module, so as to shut down the power supply switch module and the load switch module.
6. The power supply circuit according to claim 1, characterized in that, The power supply switch module and the load switch module each include power devices.
7. The power supply circuit according to claim 6, characterized in that, The power device includes at least two switching devices, and the switching devices in the same power device are connected in parallel.
8. The power supply circuit according to claim 6, characterized in that, The switching device of the load switch module includes a parasitic diode, the positive terminal of which is connected to the input terminal of the load switch module, and the negative terminal of which is connected to the load.
9. The power supply circuit according to claim 1, characterized in that, At least two of the power supply types are different.
10. A power supply system, characterized in that, Includes the power supply circuit described in any one of claims 1-9.