Multiple input power supply system

Abstract

The present application discloses a multi-input power supply system. The system includes: multiple power supply modules, multiple power switching modules and a voltage aggregation module. Each power switching module includes a voltage sampling submodule and a voltage analysis submodule. The voltage sampling submodule collects the input voltage of each power supply module. The voltage analysis submodule is connected to the voltage sampling submodule, analyzes the collected voltage, and outputs multiple first levels, each of which reflects the power supply status of a power supply module. The voltage aggregation module aggregates the first levels of the same power supply module to obtain multiple second levels, and feeds back to each voltage analysis submodule, each of which reflects the overall power supply status of a power supply module. Each voltage analysis submodule determines the target power supply module from multiple power supply modules based on the multiple second levels to supply power to the load. The present application solves the technical problem that multiple power switching modules in the relevant multi-input power supply system switch inputs asynchronously, affecting system safety.

Description

Technical Field

[0001] The present application relates to the field of power supply technology, and in particular to a multi-input power supply system. Background Art

[0002] Multi-input voltage detection and processing circuits are often used in redundant power supply systems to ensure system reliability and safety, such as Figure 1 As shown, it is assumed that there is a system containing three power supplies (A, B, C), and the priority order is set to A>B>C. When the three inputs of A, B, and C are all normal, the system gives priority to A for power supply. When the voltage of A is abnormal and the B and C are normal, the system automatically switches to C for power supply. For the system, if a non-isolated power conversion circuit topology is used, that is, the outputs of multiple input power supplies are directly connected in parallel, in this case, the following problems will occur. When the circuit breaker of A of the power supply unit PSU1 trips, PSU1 switches to B for power supply, and PSU2 still works on A. If insulation abnormality occurs in B, since the power conversion unit is not isolated, the insulation abnormality of B will be transmitted to A, causing insulation abnormality in A, which will increase the safety risks of the system and may cause equipment damage or personal injury. Secondly, when the system has an insulation warning, since multiple power supplies are output in parallel, it is impossible to accurately determine which power supply caused the insulation problem. In the case of continuous power supply to the system, it is difficult to locate the specific fault point, which increases the difficulty and time of troubleshooting.

[0003] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0004] The embodiment of the present application provides a multi-input power supply system to at least solve the technical problem that multiple power switching modules in the related multi-input power supply system switch inputs asynchronously, affecting system safety.

[0005] According to one aspect of an embodiment of the present application, a multi-input power supply system is provided, comprising: a plurality of power modules, a plurality of power switching modules and a voltage aggregation module, wherein each power switching module comprises: a voltage sampling submodule and a voltage analysis submodule, in each power switching module, the voltage sampling submodule is respectively connected to the plurality of power modules, and is used to collect the power input voltage of each power module; the voltage analysis submodule is connected to the voltage sampling submodule, and is used to analyze each power input voltage collected by the voltage sampling submodule, and output a plurality of first levels, wherein each first level is used to reflect the power supply status of a power module to the power switching module; the voltage aggregation module is respectively connected to the voltage analysis submodules in the plurality of power switching modules, and is used to aggregate the first levels corresponding to the same power module in the plurality of first levels output by the plurality of voltage analysis submodules, and obtain a plurality of second levels, and feed the plurality of second levels back to each voltage analysis submodule, wherein each second level is used to reflect the overall power supply status of a power module to the plurality of power switching modules; each voltage analysis submodule is further used to determine a target power module from the plurality of power modules to supply power to the load based on the plurality of second levels.

[0006] Optionally, the voltage sampling submodule includes: multiple first input terminals and multiple first output terminals, wherein each first input terminal is connected to a power supply module, and the multiple first output terminals are respectively connected to the voltage analysis submodule; the voltage sampling submodule is used to respectively collect the power input voltage of each power supply module, and output each power input voltage to the voltage analysis submodule through a first output terminal.

[0007] Optionally, each voltage analysis submodule includes: a voltage analysis unit and a first voltage isolation chip, the voltage analysis unit includes multiple second input terminals and multiple second output terminals, the first voltage isolation chip includes multiple third input terminals and multiple third output terminals, wherein each second input terminal is connected to a first output terminal, each third input terminal is connected to a second output terminal, and multiple third output terminals are respectively connected to the voltage summary module; the voltage analysis unit is used to analyze the power supply input voltage input by each second input terminal respectively, and output the first level corresponding to each power supply input voltage through each second output terminal respectively; the first voltage isolation chip is used to isolate the multiple first levels input by the multiple third input terminals, and output the isolated multiple first levels to the voltage summary module through the multiple third output terminals respectively.

[0008] Optionally, when the input power input voltage is normal, the first level output by the voltage analysis unit is a preset high level; when the input power input voltage is abnormal, the first level output by the voltage analysis unit is a preset low level.

[0009] Optionally, the voltage aggregation module includes: multiple voltage acquisition circuits and a second voltage isolation chip, the second voltage isolation chip includes multiple fourth input terminals and multiple fourth output terminals, and the voltage analysis unit also includes multiple fifth input terminals, wherein the first terminal of each voltage acquisition circuit is connected to a third output terminal of a first voltage isolation chip, and the second terminals of the multiple voltage acquisition circuits corresponding to the same power module are connected in parallel to a fourth input terminal of the second voltage isolation chip, and each fourth output terminal is connected to a fifth input terminal; each voltage acquisition circuit is used to acquire a first level, wherein the second terminals of the multiple voltage acquisition circuits corresponding to the same power module are connected in parallel to output the second level corresponding to the same power module; the second voltage isolation chip is used to isolate the multiple second levels input by the multiple fourth input terminals, and output the isolated multiple second levels to the voltage analysis unit through the multiple fourth output terminals respectively.

[0010] Optionally, each voltage acquisition circuit includes: a first resistor and a second resistor, wherein the first end of the first resistor is connected to a third output end of a first voltage isolation chip, the second end of the first resistor is connected to the first end of the second resistor, the second end of the second resistor is grounded, and the second ends of multiple first resistors in multiple voltage acquisition circuits corresponding to the same power supply module are connected in parallel to a fourth input end of the second voltage isolation chip.

[0011] Optionally, the voltage analysis submodule also includes: a pluggable output terminal, the pluggable output terminal includes: three power pins and multiple signal pins, the power pins include: a first output positive pin, a second output positive pin and an output negative pin, and the signal pin includes: a summary voltage input pin and a ground pin; wherein, the first end of the first output positive pin and the first end of the second output positive pin are both connected to the output positive pole of the target power module, and the second end of the first output positive pin and the second end of the second output positive pin are both connected to the input positive pole of the load; the first end of the output negative pin is connected to the output negative pole of the target power module, and the second end of the output negative pin is connected to the input negative pole of the load; the first end of each summary voltage input pin is connected to a fifth input terminal of the voltage analysis unit, and the second end of each summary voltage input pin is connected to a fourth output terminal of the second voltage isolation chip; the first end of the ground pin is connected to the ground terminal of the voltage analysis unit, and the second end of the ground pin is grounded.

[0012] Optionally, the diameter of the power pin is thicker than that of the signal pin, the length of the first output positive pin is shorter than the lengths of the second output positive pin and the output negative pin, and the length of the summary voltage input pin is longer than that of the ground pin.

[0013] Optionally, the pluggable output terminal is provided with a pin connection verification function; the voltage analysis unit is used to receive multiple second levels when all signal pins are connected normally with the voltage analysis unit and the second voltage isolation chip; and when all power pins are connected normally with the target power supply module, the target power supply module is controlled to supply power to the load.

[0014] Optionally, each voltage analysis submodule is used to sort multiple second levels from large to small; when the maximum second level is one, the power module corresponding to the maximum second level is determined as the target power module; when the maximum second level is multiple, the power module with the highest preset priority among the multiple power modules corresponding to the maximum second level is determined as the target power module.

[0015] In an embodiment of the present application, there are multiple power modules, multiple power switching modules and a voltage aggregation module, wherein each power switching module includes: a voltage sampling submodule and a voltage analysis submodule, in each power switching module, the voltage sampling submodule is respectively connected to the multiple power modules, and is used to collect the power input voltage of each power module; the voltage analysis submodule is connected to the voltage sampling submodule, and is used to analyze each power input voltage collected by the voltage sampling submodule, and output multiple first levels, wherein each first level is used to reflect the power supply status of a power module to the power switching module; the voltage aggregation module is respectively connected to the voltage analysis submodules in the multiple power switching modules, and is used to aggregate the first levels corresponding to the same power module in the multiple first levels output by the multiple voltage analysis submodules, to obtain multiple second levels, and feed the multiple second levels back to each voltage analysis submodule, wherein each second level is used to reflect the overall power supply status of a power module to multiple power switching modules; each voltage analysis submodule is also used to determine a target power module from the multiple power modules to power the load based on the multiple second levels. In this way, multiple power switching modules and voltage aggregation modules can quickly and uniformly switch the power inputs provided by multiple power modules at the same time, and the multiple inputs are independent of each other, without causing mutual interference problems. Hot plugging is supported, and the signal pins of the pluggable output terminals are used as isolation voltage conversion ports. It can more quickly identify whether the inputs of each branch of the system are abnormal, thereby solving the technical problem of asynchronous switching inputs of multiple power switching modules in related multi-input power supply systems, affecting system safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1is a structural schematic diagram of a conventional multi-input power supply system according to the technical field;

[0018] Figure 2 is a schematic structural diagram of an optional multi-input power supply system according to an embodiment of the present application;

[0019] Figure 3 is a schematic structural diagram of an optional pluggable output terminal according to an embodiment of the present application;

[0020] Figure 4 is a physical structural diagram of an optional pluggable output terminal according to an embodiment of the present application;

[0021] Figure 5 is a structural connection diagram of an optional multi-input power supply system according to an embodiment of the present application;

[0022] Figure 6 This is a schematic diagram of an optional voltage collection circuit connection according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0024] It should be noted that the terms "first", "second", etc. in the specification, claims and drawings of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] In response to the technical problem that multiple power switching modules in related multi-input power supply systems switch inputs asynchronously, affecting system safety, the present application proposes a multi-input power supply system that can ensure that all power switching modules can perform unified switching after detecting the input voltage status, thereby avoiding the problem of inconsistent switching between different power switching modules.

[0026] A multi-input power supply system of the present application is composed of: multiple power modules, multiple power switching modules and a voltage aggregation module, wherein each power switching module includes: a voltage sampling submodule and a voltage analysis submodule, in each power switching module, the voltage sampling submodule is respectively connected to the multiple power modules, and is used to collect the power input voltage of each power module; the voltage analysis submodule is connected to the voltage sampling submodule, and is used to analyze each power input voltage collected by the voltage sampling submodule, and output multiple first levels, wherein each first level is used to reflect the power supply status of a power module to the power switching module; the voltage aggregation module is respectively connected to the voltage analysis submodules in the multiple power switching modules, and is used to aggregate the first levels corresponding to the same power module in the multiple first levels output by the multiple voltage analysis submodules to obtain multiple second levels, and feed the multiple second levels back to each voltage analysis submodule, wherein each second level is used to reflect the overall power supply status of a power module to multiple power switching modules; each voltage analysis submodule is also used to determine a target power module from the multiple power modules to power the load based on the multiple second levels.

[0027] Figure 2 A structural diagram of a multi-input power supply system is given. Figure 2 In the embodiment, the output ends of the multiple power supply modules 211-21m are respectively connected to the input ends of the voltage sampling submodules 2211-22n1 of the power supply switching modules 221-22n, each voltage sampling submodule is used to periodically sample the power supply voltage input thereto, and the input ends of the voltage analysis submodules 2221-22n2 are respectively connected to the output ends of the voltage sampling submodules 2211-22n1 to analyze the power supply input voltage corresponding to the module and output a plurality of first levels, each level reflecting the power supply status of the power supply module to the power supply switching modules 221-22n. state, the input end of the voltage summary module 23 is respectively connected to the output end of the voltage analysis sub-module 2212~22n2, so as to summarize the above-mentioned multiple first levels to obtain a second level, and the second level is used to reflect the overall power supply state of a power module to multiple power switching modules 221~22n, and feed back the multiple second levels to each voltage analysis sub-module 2212~22n2, and the voltage analysis sub-module 2212~22n2 can determine the target power module from the multiple power modules 211~21m according to the second level to power the load.

[0028] As an optional implementation, the voltage sampling submodule includes: multiple first input terminals and multiple first output terminals, wherein each first input terminal is connected to a power supply module, and the multiple first output terminals are respectively connected to the voltage analysis submodule; the voltage sampling submodule is used to respectively collect the power input voltage of each power supply module, and output each power input voltage to the voltage analysis submodule through a first output terminal.

[0029] Each voltage analysis submodule includes: a voltage analysis unit and a first voltage isolation chip, the voltage analysis unit includes multiple second input terminals and multiple second output terminals, the first voltage isolation chip includes multiple third input terminals and multiple third output terminals, wherein each second input terminal is connected to a first output terminal, each third input terminal is connected to a second output terminal, and multiple third output terminals are respectively connected to the voltage summary module; the voltage analysis unit is used to analyze the power input voltage input by each second input terminal respectively, and output the first level corresponding to each power input voltage through each second output terminal respectively; the first voltage isolation chip is used to isolate the multiple first levels input by the multiple third input terminals, and output the isolated multiple first levels to the voltage summary module through the multiple third output terminals respectively.

[0030] Optionally, when the input power input voltage is normal, the first level output by the voltage analysis unit is a preset high level; when the input power input voltage is abnormal, the first level output by the voltage analysis unit is a preset low level.

[0031] Optionally, the voltage aggregation module includes: multiple voltage acquisition circuits and a second voltage isolation chip, the second voltage isolation chip includes multiple fourth input terminals and multiple fourth output terminals, and the voltage analysis unit also includes multiple fifth input terminals, wherein the first terminal of each voltage acquisition circuit is connected to a third output terminal of a first voltage isolation chip, and the second terminals of the multiple voltage acquisition circuits corresponding to the same power module are connected in parallel to a fourth input terminal of the second voltage isolation chip, and each fourth output terminal is connected to a fifth input terminal; each voltage acquisition circuit is used to acquire a first level, wherein the second terminals of the multiple voltage acquisition circuits corresponding to the same power module are connected in parallel to output the second level corresponding to the same power module; the second voltage isolation chip is used to isolate the multiple second levels input by the multiple fourth input terminals, and output the isolated multiple second levels to the voltage analysis unit through the multiple fourth output terminals respectively.

[0032] Optionally, each voltage acquisition circuit includes: a first resistor and a second resistor, wherein the first end of the first resistor is connected to a third output end of a first voltage isolation chip, the second end of the first resistor is connected to the first end of the second resistor, the second end of the second resistor is grounded, and the second ends of multiple first resistors in multiple voltage acquisition circuits corresponding to the same power supply module are connected in parallel to a fourth input end of the second voltage isolation chip.

[0033] It should be noted that the embodiment of the present application can achieve electrical isolation between the voltage acquisition circuit and the main power supply circuit by introducing a voltage isolation chip before and after the voltage acquisition circuit, thereby ensuring that the voltage signal collected during the voltage acquisition stage is a safe voltage to meet safety regulations.

[0034] Optionally, the voltage analysis submodule also includes: a pluggable output terminal, the pluggable output terminal includes: three power pins and multiple signal pins, the power pins include: a first output positive pin, a second output positive pin and an output negative pin, and the signal pin includes: a summary voltage input pin and a ground pin; wherein, the first end of the first output positive pin and the first end of the second output positive pin are both connected to the output positive pole of the target power module, and the second end of the first output positive pin and the second end of the second output positive pin are both connected to the input positive pole of the load; the first end of the output negative pin is connected to the output negative pole of the target power module, and the second end of the output negative pin is connected to the input negative pole of the load; the first end of each summary voltage input pin is connected to a fifth input terminal of the voltage analysis unit, and the second end of each summary voltage input pin is connected to a fourth output terminal of the second voltage isolation chip; the first end of the ground pin is connected to the ground terminal of the voltage analysis unit, and the second end of the ground pin is grounded.

[0035] Among them, when designing terminal pins that support hot plugging, the diameter of the power pin is usually thicker than the diameter of the signal pin. The thicker diameter reduces resistance and improves conductivity, so that when the power pin carries a large current, it can reduce power loss and reduce the heating problem caused by excessive current. In order to ensure safety during hot plugging, the length of the first output positive pin is usually shorter than the length of the second output positive pin and the output negative pin. Considering the signal synchronization problem during hot plugging, the length of each summary voltage input pin is usually longer than the length of the ground pin. This is because if the length of the summary voltage input pin and the ground pin is the same, there will often be errors between the pin lengths of each summary voltage input pin, which will cause the signals input by each summary voltage input pin to be out of sync during hot plugging. At this time, the voltage corresponding to the summary voltage signal pin that contacts first will be reduced first, causing the system to malfunction; by designing the length of the common ground pin of each summary voltage input pin to be shorter than the length of each summary voltage input pin, even if there is an error between the pin lengths of each summary voltage input pin, due to the common ground, the signals input by each summary voltage input pin are still synchronized and will not cause erroneous switching. A schematic diagram of a planar structure of an optional pluggable output terminal in an embodiment of the present application is shown in FIG. Figure 3 As shown, the physical structure diagram is as follows Figure 4 shown.

[0036] Optionally, to further improve safety, the pluggable output terminal is also provided with a pin connection verification function; the voltage analysis unit receives multiple second levels only when all signal pins are connected normally to the voltage analysis unit and the second voltage isolation chip; and the target power supply module is controlled to supply power to the load only when all power pins are connected normally to the target power supply module.

[0037] Figure 5 A structural diagram of a multi-input power supply system according to an embodiment of the present application is given. Figure 5 In the input power supply, multiple power supply modules 511-519 are included, wherein the power supply modules Vin1_A_sam, Vin2_A_sam, Vin3_A_sam are all A power supplies, Vin1_B_sam, Vin2_B_sam, Vin3_B_sam are all B power supplies, Vin1_C_sam, Vin2_C_sam, Vin3_C_sam are all C power supplies, and the three branches of Vin1_A_sam, Vin1_B_sam, and Vin1_C_sam are used for example analysis, and the other branches are analyzed by analogy. The input end of the voltage sampling submodule 5211 is respectively connected to the power supply modules Vin1_A_sam, Vin1_B_sam, and Vin1_C_sam, and the output of the module is respectively connected to the input end of the voltage analysis unit 52121 of the voltage analysis submodule 5212, and multiple first levels are output to the voltage The input end of the first voltage isolation chip 52122 of the analysis submodule 5212 and the output end of the first voltage isolation chip 52122 are respectively connected to the voltage acquisition circuit of the voltage aggregation module 33. For the power supply Vin1_A_sam branch, the branch includes a voltage acquisition circuit 531. The output Vin1_A_sam1 of the branch is connected in parallel with other branches of the same power supply output. Similarly, the voltage acquisition circuit 531, the voltage acquisition circuit 534, and the voltage acquisition circuit 537 all belong to the A power supply. Therefore, the output ends of these three branches are connected in parallel, and their outputs are connected to an input port of the second voltage isolation chip. Each branch is connected in this way. Finally, the second voltage isolation chip outputs the corresponding VA_sam or VB_sam or VC_sam, and VA_sam, VB_sam, and VC_sam are respectively connected to the voltage analysis submodules 5212, 5222, and 5232.

[0038] Figure 6 Given the above Figure 5 The specific circuit diagram of multiple voltage acquisition circuits in the example Figure 6As shown, each voltage acquisition circuit includes: a first resistor and a second resistor. Taking one of the voltage acquisition circuits as an example, the first end of the first resistor R1A1 inputs the first level 1 of the third output end of the first voltage isolation chip, the second end of the first resistor R1A1 is connected to the first end of the second resistor R1A2, and the second end of the second resistor R1A2 is grounded. Since the first level 1, the first level 4, and the first level 7 all correspond to the A power supply, that is, the power supply module is the same, the second end of the first resistor R1A1, the second end of the first resistor R2A1, and the second end of the first resistor R3A1 are connected in parallel to a fourth input end of the second voltage isolation chip, and the same connection method is used for other voltage acquisition circuits.

[0039] As an optional implementation, in the above system, each voltage analysis submodule is also used to sort multiple second levels from large to small; when the maximum second level is one, the power module corresponding to the maximum second level is determined as the target power module; when the maximum second level is multiple, the power module with the highest preset priority among the multiple power modules corresponding to the maximum second level is determined as the target power module.

[0040] The specific calculation and switching process can be referred to as follows:

[0041] Likewise Figure 6 Taking the circuit shown as an example, to simplify the design, the resistance values ​​of resistors R1A1, R1B1, R1C1, R2A1, R2B1, R2C1, R3A1, R3B1, and R3C1 remain the same and are defined as R001; the resistance values ​​of R1A2, R1B2, R1C2, R2A2, R2B2, R2C2, R3A2, R3B2, and R3C2 remain the same and are defined as R002.

[0042] The output voltage of the second output terminal, that is, the output terminal of the voltage analysis unit is defined as Vcc.

[0043] Analysis of A path of a power switching module:

[0044] When Vin1_A_sam is set to high level 1, the VA_sam voltage is

[0045] When Vin1_A_sam is set to low level 0, the VA_sam voltage is 0.

[0046] For the analysis of the two power switching modules A, Vin1_A_sam and Vin2_A_sam have the following four combinations: (0, 0), (0, 1), (1, 0), (1, 1):

[0047] (0, 0) state: VA_sam voltage is: 0;

[0048] (0, 1), (1, 0) state: VA_sam voltage is:

[0049] (1, 1) state: VA_sam voltage is:

[0050] For the analysis of the A-path of the three power switching modules, Vin1_A_sam, Vin2_A_sam, and Vin3_A_sam have the following four combinations: (0, 0, 0), (0, 0, 1), (0, 1, 0), (1, 0, 0), (0, 1, 1), (1, 1, 0), (1, 0, 1), (1, 1, 1):

[0051] (0, 0, 0) state: VA_sam voltage is 0V;

[0052] (0, 0, 1), (0, 1, 0), (1, 0, 0) state: VA_sam voltage is:

[0053] (0, 1, 1), (1, 1, 0), (1, 0, 1) state: VA_sam voltage is:

[0054] (1, 1, 1) state: VA_sam voltage is:

[0055] No matter how many power switching modules there are, it is only necessary to collect the voltages of VA_sam1, VB_sam1, and VC_sam1 and compare the voltages of each branch. When the voltages of each branch are the same, they will automatically work in the highest priority (first priority) branch according to the set priority or send other branches through background monitoring. When the voltage of the first priority branch is lower than the voltage of the second priority branch, all power switching modules in the system will automatically switch to the second priority. When the voltages of the first and second priority branches are both lower than the voltage of the third priority branch, all power switching modules in the system will automatically switch to the third priority. When there are more power switching modules, the switching method is similar.

[0056] In an embodiment of the present application, there are multiple power modules, multiple power switching modules and a voltage aggregation module, wherein each power switching module includes: a voltage sampling submodule and a voltage analysis submodule, in each power switching module, the voltage sampling submodule is respectively connected to the multiple power modules, and is used to collect the power input voltage of each power module; the voltage analysis submodule is connected to the voltage sampling submodule, and is used to analyze each power input voltage collected by the voltage sampling submodule, and output multiple first levels, wherein each first level is used to reflect the power supply status of a power module to the power switching module; the voltage aggregation module is respectively connected to the voltage analysis submodules in the multiple power switching modules, and is used to aggregate the first levels corresponding to the same power module in the multiple first levels output by the multiple voltage analysis submodules, to obtain multiple second levels, and feed the multiple second levels back to each voltage analysis submodule, wherein each second level is used to reflect the overall power supply status of a power module to multiple power switching modules; each voltage analysis submodule is also used to determine a target power module from the multiple power modules to power the load based on the multiple second levels. In this way, multiple power switching modules and voltage aggregation modules can quickly and uniformly switch the power inputs provided by multiple power modules at the same time, and the multiple inputs are independent of each other, without causing mutual interference problems. Hot plugging is supported, and the signal pins of the pluggable output terminals are used as isolation voltage conversion ports. It can more quickly identify whether the inputs of each branch of the system are abnormal, thereby solving the technical problem of asynchronous switching inputs of multiple power switching modules in related multi-input power supply systems, affecting system safety.

[0057] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0058] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0059] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed over multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0060] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0061] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or all or part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of each embodiment method of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc. Various media that can store program codes.

[0062] The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A multi-input power supply system, characterized in that: include: Multiple power supply modules, multiple power supply switching modules and voltage summary modules, wherein each of the power supply switching modules includes: a voltage sampling submodule and a voltage analysis submodule, and in each of the power supply switching modules, The voltage sampling submodule is connected to the plurality of power modules respectively, and is used to collect the power input voltage of each power module; The voltage analysis submodule is connected to the voltage sampling submodule, and is used to analyze each of the power input voltages collected by the voltage sampling submodule, and output a plurality of first levels, wherein each of the first levels is used to reflect the power supply status of one of the power modules to the power switching module; The voltage summary module is respectively connected to the voltage analysis submodules in the plurality of power switching modules, and is used to summarize the first levels corresponding to the same power module among the plurality of first levels output by the plurality of voltage analysis submodules to obtain a plurality of second levels, and feed the plurality of second levels back to each of the voltage analysis submodules, wherein each of the second levels is used to reflect the overall power supply status of one power module to the plurality of power switching modules; Each of the voltage analysis submodules is further used to determine a target power supply module from the plurality of power supply modules to supply power to the load according to the plurality of the second levels.

2. The system according to claim 1, characterized in that The voltage sampling submodule includes: a plurality of first input terminals and a plurality of first output terminals, wherein each of the first input terminals is connected to one of the power supply modules, and the plurality of the first output terminals are respectively connected to the voltage analysis submodule; The voltage sampling submodule is used to respectively collect the power input voltage of each of the power modules, and output each power input voltage to the voltage analysis submodule through one of the first output terminals.

3. The system according to claim 2, characterized in that Each of the voltage analysis submodules includes: a voltage analysis unit and a first voltage isolation chip, wherein the voltage analysis unit includes a plurality of second input terminals and a plurality of second output terminals, and the first voltage isolation chip includes a plurality of third input terminals and a plurality of third output terminals, wherein each of the second input terminals is connected to one of the first output terminals, each of the third input terminals is connected to one of the second output terminals, and the plurality of third output terminals are respectively connected to the voltage summary module; The voltage analysis unit is used to analyze the power input voltage inputted from each of the second input terminals respectively, and output the first level corresponding to each of the power input voltages respectively through each of the second output terminals; The first voltage isolation chip is used to isolate the multiple first levels input from the multiple third input terminals, and output the isolated multiple first levels to the voltage aggregation module through the multiple third output terminals respectively.

4. The system according to claim 3, characterized in that When the input power supply voltage is normal, the first level output by the voltage analysis unit is a preset high level; In the case that the input power input voltage is abnormal, the first level output by the voltage analysis unit is a preset low level.

5. The system according to claim 3, characterized in that The voltage aggregation module includes: a plurality of voltage collection circuits and a second voltage isolation chip, the second voltage isolation chip includes a plurality of fourth input terminals and a plurality of fourth output terminals, and the voltage analysis unit also includes a plurality of fifth input terminals, wherein the first terminal of each of the voltage collection circuits is connected to one of the third output terminals of the first voltage isolation chip, the second terminals of the plurality of voltage collection circuits corresponding to the same power module are connected in parallel to one of the fourth input terminals of the second voltage isolation chip, and each of the fourth output terminals is connected to one of the fifth input terminals; Each of the voltage collection circuits is used to collect one channel of the first electrical level, wherein the second ends of the plurality of voltage collection circuits corresponding to the same power module connected in parallel output the second electrical level corresponding to the same power module; The second voltage isolation chip is used to isolate the plurality of second levels inputted from the plurality of fourth input terminals, and output the isolated plurality of second levels to the voltage analysis unit through the plurality of fourth output terminals respectively.

6. The system according to claim 5, characterized in that Each of the voltage acquisition circuits includes: a first resistor and a second resistor, wherein the first end of the first resistor is connected to the third output end of one of the first voltage isolation chips, the second end of the first resistor is connected to the first end of the second resistor, the second end of the second resistor is grounded, and the second ends of the multiple first resistors in the multiple voltage acquisition circuits corresponding to the same power supply module are connected in parallel to the fourth input end of the second voltage isolation chip.

7. The system according to claim 5, characterized in that The voltage analysis submodule further includes: a pluggable output terminal, wherein the pluggable output terminal includes: three power pins and multiple signal pins, wherein the power pins include: a first output positive pin, a second output positive pin and an output negative pin, and the signal pins include: a summary voltage input pin and a ground pin; Among them, the first end of the first output positive needle and the first end of the second output positive needle are both connected to the output positive electrode of the target power module, and the second end of the first output positive needle and the second end of the second output positive needle are both connected to the input positive electrode of the load; the first end of the output negative needle is connected to the output negative electrode of the target power module, and the second end of the output negative needle is connected to the input negative electrode of the load; the first end of each of the summary voltage input needles is connected to a fifth input terminal of the voltage analysis unit, and the second end of each of the summary voltage input needles is connected to one of the fourth output terminals of the second voltage isolation chip; the first end of the grounding needle is connected to the grounding terminal of the voltage analysis unit, and the second end of the grounding needle is grounded.

8. The system according to claim 7, characterized in that The diameter of the power pin is thicker than that of the signal pin, the length of the first output positive pin is shorter than the lengths of the second output positive pin and the output negative pin, and the length of the summary voltage input pin is longer than that of the ground pin.

9. The system according to claim 7, characterized in that The pluggable output terminal is provided with a pin connection verification function; The voltage analysis unit is used to receive multiple second levels when all the signal pins are normally connected to the voltage analysis unit and the second voltage isolation chip; and to control the target power module to supply power to the load when all the power pins are normally connected to the target power module.

10. The system according to claim 1, characterized in that Each of the voltage analysis submodules is used to sort the plurality of second levels from large to small; when the largest second level is one, determine the power module corresponding to the largest second level as the target power module; In the case that there are multiple maximum second levels, a power module with the highest preset priority among the multiple power modules corresponding to the maximum second level is determined as the target power module.

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