Power management system and control method

Abstract

The invention provides a power management system and a control method, which are applied to the technical field of power electronics. The power management system comprises a power switching module, a control module and a driving module, the power supply switching module comprises at least two input paths, and each input path is used for receiving different input voltages; wherein the at least two input channels comprise a main input channel. The control module is used for acquiring input parameters of the main input path; and the control module is used for receiving the input parameters of the main input channel, judging whether the current input state of the power management system is abnormal according to the input parameters of the main input channel, and if so, sending a control signal to the power switching module to cut off the main input channel and conduct any other channel except the main input channel. On the basis, the condition of multi-power-supply input can be maintained, the electrical system can more flexibly distribute electric power resources, meanwhile, after one power supply breaks down, input adjustment of the power supplies is achieved, normal operation of the electrical system is guaranteed, and the overall efficiency of the system is improved.

Description

Technical Field

[0001] The present invention relates to the field of power electronics technology, and in particular to a power management system and a control method. Background Art

[0002] With the development of power electronics technology, 48V electrical systems have gradually become an important component in automobiles and other industrial applications. Usually, a 48V electronic mechanical brake system includes two power inputs, such as a 48V power input path and a 12V power input path. The two power inputs independently serve different parts of the 48V electrical system. For example, the 12V power supply is mainly responsible for the power supply of traditional automotive electronic equipment, such as the ignition system, instrument panel, audio system, etc., while the 48V power supply is used to drive devices with higher power requirements, such as electric superchargers, air conditioning compressors, electric power steering systems, etc.

[0003] Since the above two power supplies serve different parts respectively, if any part fails, it cannot be guaranteed that the electrical system can maintain normal operation after one of the power supplies fails.

[0004] Based on this, there is an urgent need for an electrical system that can maintain normal operation of the electrical system after one of the power sources fails while maintaining multiple power inputs. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a power management system and control method, which can maintain the conditions of multiple power inputs, so that the electrical system can allocate power resources more flexibly. At the same time, after one of the power supplies fails, the power input can be adjusted to ensure the normal operation of the electrical system and improve the overall efficiency of the system.

[0006] In order to achieve the above purpose, the technical solution adopted by the embodiment of the present invention is as follows: In a first aspect, the present invention further provides a power management system, comprising a power switching module, a control module and a drive module; the power switching module comprises at least two input paths, each input path is used to receive a different input voltage; the output end of the power switching module is electrically connected to the control module and the drive module respectively, so as to supply power to the control module and the drive module respectively; the control module is also connected to the control end of the power switching module and the control end of the drive module; wherein the at least two input pathways include a main input pathway; The control module is used to obtain the input parameters of the main input path; and determine whether the input state of the current power management system is abnormal based on the input parameters of the main input path. If abnormal, a control signal is sent to the power switching module to cut off the main input path and conduct any other path except the main input path; The power switching module includes a first switching unit, the output end of each input path is connected to the input end of the first switching unit, and the output end of the first switching unit is connected to the input end of the control module; A first switching unit, used for converting the input voltage corresponding to each input path into a target voltage value to supply power to the control module; Or the output end of the main input path is connected to the input end of the first switching unit, and the output end of the first switching unit and the output ends of other paths except the main input path are connected to the input end of the control module; The first switching unit is used to convert the input voltage corresponding to the main input path into a target voltage value to supply power to the control module.

[0007] Optionally, the power switching module further includes at least two switch components, each switch component corresponds to an input path, and each input path is connected to the control module through the corresponding switch component; The control module is used to send a first control instruction to the switch component corresponding to the main input path and the switch component corresponding to any other path except the main input path when it is determined that the input state of the current power management system is in an abnormal state, so as to cut off the main input path and conduct any other path except the main input path.

[0008] Optionally, the power switching module includes a first detection module and a second detection module, both of which are communicatively connected to the control module; the first detection module is also communicatively connected to a switch component corresponding to a main input path; the second detection module is also communicatively connected to switch components corresponding to other paths except the main input path; A first detection module, used for detecting input parameters of a main input path; A control module, configured to send a first control signal to the first detection module and the second detection module after determining that the input state of the current power management system is abnormal according to the input parameters of the main input path; The first detection module is further used to cut off the switch component corresponding to the main input path according to the first control signal; The second detection module is used to turn on the switch component corresponding to any other path except the main input path according to the first control signal.

[0009] Optionally, the first switching unit includes a first conversion component, which includes multiple input terminals, each input terminal is connected to the output terminal of an input path respectively, so as to convert the input voltage corresponding to each input path into a target voltage value; the output terminal of the first conversion component is connected to the input terminal of the control module.

[0010] Optionally, the first switching unit includes a second conversion component, a first OR logic gate, and a first diode, and an input end of the second conversion component is connected to an output end of the main input path to convert an input voltage of the main input path into a target voltage value; The first OR logic gate includes multiple input terminals; the output terminal of the second conversion component and the output terminal of any other path except the main input path are respectively connected to an input terminal of the first OR logic gate; the output terminal of the first OR logic gate is connected to the first terminal of the first diode; the second terminal of the first diode is connected to the input terminal of the control module.

[0011] Optionally, the power switching module further includes a second switching unit, the input end of the second switching unit is respectively connected to the output end of each input path, and the output end of the second switching unit is connected to the power input end of the driving module; wherein, The second switching unit is used to adjust the supply voltage of the driving module according to the input state of the current power management system.

[0012] Optionally, the second switching unit includes a second OR logic gate and a first inductor, the second OR logic gate includes multiple input terminals, each input terminal is respectively connected to the output terminal of an input path; the output terminal of the second OR logic gate is connected to the first terminal of the first inductor, and the second terminal of the first inductor is connected to the power input terminal of the driving module.

[0013] Optionally, the power management system further includes a pre-charging circuit, the pre-charging circuit being connected to the output end of the main input path; The control module is also used to obtain the charging state of the pre-charging circuit; and determine whether the charging state is completed. If completed, a second control instruction is sent to the switch component corresponding to the main input path to turn on the main input path.

[0014] In a second aspect, the present invention further provides a control method of a power management system, which is applied to a control module of the power management system, wherein the power management system further comprises a power switching module and a driving module; the power switching module comprises at least two input paths, each input path being used to receive a different input voltage; wherein the at least two input paths comprise a main input path; the control method comprises: Get the input parameters of the main input path; Whether the input state of the current power management system is abnormal is determined based on the input parameters of the main input path. If abnormal, a control signal is sent to the power switching module to cut off the main input path and turn on any other path except the main input path.

[0015] The power management system and control method provided by the embodiments of the present invention have the following beneficial effects: The power management system in the present invention includes a power switching module, a control module and a drive module; the power switching module includes at least two input paths, each input path is used to receive different input voltages; wherein, at least two input paths include a main input path. The control module is used to obtain the input parameters of the main input path; and judge whether the input state of the current power management system is abnormal based on the input parameters of the main input path. If abnormal, a control signal is sent to the power switching module to cut off the main input path and conduct any other path except the main input path. Based on this, the present invention can maintain the condition of multiple power inputs, so that the electrical system can allocate power resources more flexibly. At the same time, after one of the power sources fails, the input adjustment of the power source is realized to ensure the normal operation of the electrical system and improve the overall efficiency of the system.

[0016] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 One of the structural schematic diagrams of the power management system provided by the embodiment of the present invention is shown; Figure 2 A second schematic diagram of the structure of a power management system provided by an embodiment of the present invention is shown; Figure 3 The third structural diagram of the power management system provided by the embodiment of the present invention is shown; Figure 4 A fourth structural diagram of a power management system provided by an embodiment of the present invention is shown; Figure 5 A fifth structural diagram of a power management system provided by an embodiment of the present invention is shown; Figure 6 A sixth structural diagram of a power management system provided by an embodiment of the present invention is shown; Figure 7 FIG7 shows a seventh structural diagram of a power management system provided by an embodiment of the present invention; Figure 8 A circuit schematic diagram of a power management system provided by an embodiment of the present invention is shown; Fig. 9 A flow chart of the steps of the control method provided by an embodiment of the present invention is shown.

[0019] Icons: 10-power management system; 11-power switching module; 12-control module; 13-drive module; 14-pre-charge circuit; 21-switch component; 22-first detection module; 23-second detection module; 24-first switching unit; 25-second switching unit; 31-first conversion component; 32-second conversion component; 33-first OR logic gate; D1-first diode; 34-second OR logic gate; L1-first inductor. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0022] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0023] In the prior art, a 48V electronic mechanical brake system includes two power inputs, such as a 48V power input path and a 12V power input path. The two power inputs independently serve different parts of the 48V electrical system. The two power supplies each serve a different part, and the electrical system cannot maintain normal operation after any power supply fails.

[0024] Based on this, the present invention provides a power management system that can maintain the normal operation of the electrical system after any power supply fails.

[0025] First, please refer to Figure 1 , Figure 1 One of the structural schematic diagrams of the power management system in the present invention is shown, which includes a power switching module 11, a control module 12 and a drive module 13; the power switching module 11 includes at least two input paths, each input path is used to receive a different input voltage; the output end of the power switching module 11 is electrically connected to the control module 12 and the drive module 13 respectively to supply power to the control module 12 and the drive module 13 respectively; the control module 12 is also connected to the control end of the power switching module 11 and the control end of the drive module 13.

[0026] Wherein, the at least two input paths include a main input path.

[0027] The control module 12 is used to obtain the input parameters of the main input path; and determine whether the input state of the current power management system is abnormal based on the input parameters of the main input path; if abnormal, a control signal is sent to the power switching module 11 to cut off the main input path and turn on any other path except the main input path.

[0028] Please continue to refer to Figure 1 In this embodiment, the power management system includes at least two input paths, wherein each input path corresponds to a different input voltage, for example, input voltage 1, ..., input voltage n, wherein input voltage 1, ..., input voltage n are all different. The control module is used to obtain the input parameters of the main input path, and then when the main input path fails, the control power switching module cuts off the main input path and turns on any other path except the main input path, so that under the condition of dual power input, if any power source fails, it can quickly switch to ensure the normal operation of the electrical system. In this embodiment, the control module is also used to adjust the working state of the drive module to control the operation of loads such as motors. It should be noted that in this embodiment, the control module does not limit the adjustment method of the drive module as long as the vehicle control can be guaranteed.

[0029] Based on this, this embodiment enables the electrical system to allocate power resources more flexibly. At the same time, when the main power supply, that is, the above-mentioned main input path, fails, the power input is quickly adjusted to ensure the normal power supply of the control module and the drive module, so that the electrical system can operate normally and the overall efficiency of the system is improved.

[0030] Taking the 48V electronic mechanical brake system in the background technology as an example, the input path corresponding to the 48V power supply can be used as the main input path. When the 48V output path fails, the control module can adjust the power switching module to cut off the 48V output path and select any path other than the 48V output path, such as the 12V output path. At this time, the 12V input voltage can be used to maintain the operation of the drive module and the control module.

[0031] It should be noted that in this embodiment, the power switching module cuts off the main input path, and after turning on any path except the main input path, the corresponding turned-on input path will also supply power to the driver module set at the back end. In this embodiment, the driver module is compatible with multiple input voltages, such as 12V, 48V, etc.

[0032] In this embodiment, please Figure 1 Based on Figure 2 , Figure 2 The second structural diagram of the power management system in the present invention is shown. The power switching module 11 also includes at least two switch components 21. Each switch component 21 corresponds to an input path, and each input path is connected to the control module 12 through the corresponding switch component 21.

[0033] The control module 12 is used to send a first control instruction to the switch component 21 corresponding to the main input path and the switch component 21 corresponding to any other path except the main input path when it is determined that the input state of the current power management system is in an abnormal state, so as to cut off the main input path and turn on any other path except the main input path.

[0034] In this embodiment, the switch assembly may use back-to-back switches to further increase the reliability of the power management system.

[0035] In this embodiment, a switch component is set on each input channel, and then after determining that the input state of the current power management system is in an abnormal state, the control module sends a control instruction to the corresponding switch component to close the main input path and turn on any input channel other than the main input path. Taking the above-mentioned 48V electronic mechanical brake system as an example, when the input path corresponding to the 48V power supply is the main input path, when the 48V output path fails, the switch component of the 48V output path can be cut off by the control module, and any path other than the 48V output path can be turned on, such as turning on the corresponding switch component on the 12V output path.

[0036] The power management system provided in this embodiment includes multiple input paths, that is, it is compatible with multiple input voltages or power supplies. Each input path is partially turned on when the power management system is working normally, that is, only one input path will be used as the main input channel, and the remaining input channels will only be partially turned on when the main input channel input is maintained and the input state of the current power management system fails, that is, the control module sends a turn-on instruction to any input channel, and except for the above-mentioned input channels that are turned on, the remaining input channels are in a non-working state.

[0037] To further increase the stability of the power management system, if input channel 1 corresponding to input voltage 1 is used as the main input channel, please Figure 2 Based on the reference Figure 3 , Figure 3The third structural diagram of a power management system is shown. In this embodiment, the power management system further includes a pre-charging circuit 14, which is connected to the output end of the main input path.

[0038] The control module 12 is also used to obtain the charging state of the pre-charging circuit; and determine whether the charging state is completed. If completed, a second control instruction is sent to the switch component 21 corresponding to the main input path to turn on the main input path.

[0039] In this embodiment, taking the 48V input path as the main input path as an example, when the power management system 10 is powered on, the pre-charging circuit 14 can be charged first, and after the charging is completed, the pre-charging circuit 14 is disconnected, and the switch component 21 corresponding to the main input path is opened manually or automatically by the control module 12 to conduct the main input path. In this embodiment, the pre-charging circuit 14 can be used to prevent the power management system 10 from being damaged by instantaneous large current.

[0040] Taking a 48V electrical system as an example, where the 48V input path is the main input path and the 12V input path is the corresponding conductive input path, the control module in this embodiment can be provided with two power management chips to monitor the corresponding input paths respectively and adjust the conduction / or closing of the switch components on the corresponding paths.

[0041] In one possible implementation, Figure 2 Based on the reference Figure 4 , Figure 4 The fourth structural diagram of a power management system is shown. The power switching module 11 includes a first detection module 22 and a second detection module 23, both of which are connected to the control module 12 in communication; the first detection module 22 is also connected to the switch component 21 corresponding to the main input path in communication; the second detection module 23 is also connected to the switch component 21 corresponding to other paths except the main input path in communication.

[0042] The first detection module 22 is used to detect the input parameters of the main input path; the control module 12 is used to send a first control signal to the first detection module and the second detection module after determining that the input state of the current power management system is abnormal based on the input parameters of the main input path.

[0043] The first detection module 22 is further used to cut off the switch component corresponding to the main input path according to the first control signal. The second detection module 23 is used to turn on the switch component corresponding to any other path except the main input path according to the first control signal.

[0044] Based on this, in this embodiment, the 48V input path and the 12V input path are redundant with each other and are not turned on at the same time. Only when one of the paths fails, the other path is automatically switched to supply power and the current input path is closed at the same time.

[0045] Furthermore, in this embodiment, a pre-charging circuit can be integrated on the power management chip corresponding to the 48V input path. When the 48V electrical system is powered on, the pre-charging circuit can be charged first. After charging, the pre-charging circuit can be disconnected, and then the back-to-back switch can be turned on to power the entire control module.

[0046] In a possible implementation, in this embodiment, the power management chip corresponding to the 12V input path can be selected as the L9396 chip; the control module can be selected as the TC234 chip; and the drive module can be selected as the DRV3255 chip.

[0047] If the 12V input power source is used as the target voltage value, the input voltages corresponding to the multiple input paths in this embodiment are all different from the target voltage value. In a possible implementation, the power switching module 11 includes a first switching unit 24. The first switching unit 24 is used to adjust the voltage corresponding to each input path to the target voltage value.

[0048] Furthermore, the output end of each input path is connected to the input end of the first switching unit 24 , and the output end of the first switching unit 24 is connected to the input end of the control module 12 .

[0049] The first switching unit 24 is used to convert the input voltage corresponding to each input path into a target voltage value to supply power to the control module 12 .

[0050] This embodiment also provides an implementation method of the first switching unit 24. Figure 2 Based on Figure 5 , Figure 5 A schematic diagram of the structure of the power management system in this embodiment is shown; in this embodiment, the first switching unit 24 includes a first conversion component 31, the first conversion component 31 includes a plurality of input terminals, each input terminal is respectively connected to the output terminal of an input path to convert the input voltage corresponding to each input path into a target voltage value; the output terminal of the first conversion component 31 is connected to the control module 12.

[0051] In this embodiment, the first conversion component 31 may be a voltage conversion chip. After providing different input voltages, the voltage conversion chip may be used to convert the input voltage to a target voltage value to power the control module 12 .

[0052] In another possible implementation, when the voltage corresponding to the main input channel in this embodiment does not meet the target voltage value, the first switching unit in this embodiment is used to adjust the voltage corresponding to the main input channel to the target voltage value. For example, the target voltage value is 12V, and the voltage corresponding to the main input voltage is 48V. At this time, 48V needs to be converted to 12V. In this embodiment, the output end of the main input channel is connected to the input end of the first switching unit, and the output end of the first switching unit and the output ends of other channels except the main input channel are connected to the input end of the control module.

[0053] The first switching unit is used to convert the input voltage corresponding to the main input path into a target voltage value to supply power to the control module.

[0054] This embodiment also provides another implementation of the first switching unit 24. To further avoid interference between input voltages corresponding to multiple input paths, if input channel 1 corresponding to input voltage 1 is used as the main input channel, please refer to Figure 6 , Figure 6 Another structural schematic diagram of the first switching unit 24 in this embodiment is shown; the first switching unit 24 includes a second conversion component 32, a first OR logic gate 33, and a first diode D1. The input end of the second conversion component 32 is connected to the output end of the main input path to convert the input voltage of the main input path into a target voltage value.

[0055] The first OR logic gate 33 includes multiple input terminals; the output terminal of the second conversion component 32 and the output terminal of any other path except the main input path are respectively connected to an input terminal of the first OR logic gate 33; the output terminal of the first OR logic gate 33 is connected to the first end of the first diode D1; the second end of the first diode D1 is connected to the input terminal of the control module 12.

[0056] In this embodiment, taking the 48V input path and the 12V input path as an example, the first OR logic gate 33 includes at least two input terminals, the output terminal of the 48V input path and the output terminal of the 12V input path are respectively connected to one input terminal of the first OR logic gate 33, and the output terminal of the first OR logic gate 33 is connected to the anode of the first diode D1. In this embodiment, the first OR logic gate 33 avoids interference between corresponding input voltages between multiple input paths based on its own logic function, thereby ensuring system stability.

[0057] To further ensure that the power supply of the driver module is normal, please refer to Figure 7 , Figure 7 Another structural schematic diagram of the power management system is shown; in this embodiment, the power switching module 11 also includes a second switching unit 25, the input end of the second switching unit 25 is respectively connected to the output end of each input path, and the output end of the second switching unit 25 is connected to the power input end of the driving module 13.

[0058] The second switching unit 25 is used to adjust the supply voltage of the driving module 13 according to the input state of the current power management system.

[0059] Taking the 48V electronic mechanical brake system in the background technology as an example, when the 48V input path has power supply abnormality, it can switch to the 12V input path to supply power to the drive motor, and the power supply abnormality will not interfere with the normal operation of the drive part. The same concept as the above embodiment is used to further avoid interference between corresponding input voltages between multiple input paths. Please continue to refer to Figure 7 The second switching unit 25 includes a second OR logic gate 34 and a first inductor L1. The second OR logic gate 34 includes multiple input terminals, each of which is connected to the output terminal of an input path; the output terminal of the second OR logic gate 34 is connected to the first terminal of the first inductor, and the second terminal of the first inductor L1 is connected to the power input terminal of the driving module 13.

[0060] Please refer to Figure 8 , Figure 8 A circuit schematic diagram of a power management system is shown. This embodiment includes a power switching module, a control module and a drive module; the power switching module includes at least a 48V input path and a 12V input path, and the 48V input path is the main input path, wherein the input of the 48V input path can be provided by a battery BAT-48V; the input of the 12V input path can be provided by a battery BAT-12V; the control module is used to obtain input parameters of the 48V input path; and based on the input parameters of the 48V input path, it is determined whether the input state of the current power management system is abnormal. If abnormal, a control signal is sent to the power switching module to cut off the 48V input path and turn on the 12V input path.

[0061] Among them, the TC234 chip and the DRV3255 chip can be connected via SPI (Serial Peripheral interface, serial communication bus). Similarly, the pre-charge circuit and the TC234 chip can be connected via SPI; the L9396 chip and the TC234 chip are connected via SPI. The second end of the first inductor L1 can output a voltage VCC-POWER to power the drive module 13.

[0062] Based on this, the present invention can prevent the traditional electronic mechanical braking system from completely losing control of the wheels when one of the power supplies fails, and can enable the currently used dual power solution to maintain control of the vehicle even when a single power supply fails.

[0063] Secondly, please Figure 1 Based on the reference Fig. 9 , Fig. 9A flow chart of the steps of the control method provided by the present invention is shown. The control method of the power management system is applied to the control module of the power management system. The power management system also includes a power switching module and a driving module. The power switching module includes at least two input paths, each input path is used to receive a different input voltage. Among them, at least two input paths include a main input path. The control method includes steps 100 to 200.

[0064] Step 100, obtaining input parameters of the main input path; Step 200: determine whether the input state of the current power management system is abnormal based on the input parameters of the main input path. If abnormal, send a control signal to the power switching module to cut off the main input path and turn on any other path except the main input path.

[0065] Based on this, the present invention can maintain the condition of multiple power inputs, so that the electrical system can allocate power resources more flexibly. At the same time, after one of the power supplies fails, the power input can be adjusted to ensure the normal operation of the electrical system and improve the overall efficiency of the system.

[0066] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present invention. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0067] In addition, the functional modules in the various embodiments of the present invention may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0068] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, and other media that can store program codes.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A power management system, characterized in that: It includes a power switching module, a control module and a driving module; the power switching module includes at least two input paths, each of which is used to receive different input voltages; the output end of the power switching module is electrically connected to the control module and the driving module respectively to supply power to the control module and the driving module respectively; the control module is also connected to the control end of the power switching module and the control end of the driving module; wherein the at least two input pathways include a main input pathway; The control module is used to obtain the input parameters of the main input path; and determine whether the input state of the current power management system is abnormal according to the input parameters of the main input path. If abnormal, a control signal is sent to the power switching module to cut off the main input path and conduct any other path except the main input path; The power switching module further includes a first switching unit, the output end of each input path is connected to the input end of the first switching unit, and the output end of the first switching unit is connected to the input end of the control module; The first switching unit is used to convert the input voltage corresponding to each of the input paths into a target voltage value to supply power to the control module; or the output end of the main input path is connected to the input end of the first switching unit, and the output end of the first switching unit and the output ends of other paths except the main input path are connected to the input end of the control module; The first switching unit is used to convert the input voltage corresponding to the main input path into a target voltage value to supply power to the control module.

2. The power management system according to claim 1, characterized in that: The power switching module further includes at least two switch components, each switch component corresponds to an input path, and each input path is connected to the control module through a corresponding switch component; The control module is used to send a first control instruction to the switch component corresponding to the main input path and the switch component corresponding to any other path except the main input path when it is determined that the input state of the current power management system is in an abnormal state, so as to cut off the main input path and turn on any other path except the main input path.

3. The power management system according to claim 2, characterized in that: The power switching module includes a first detection module and a second detection module, both of which are connected to the control module in communication; the first detection module is also connected to the switch component corresponding to the main input path in communication; the second detection module is also connected to the switch components corresponding to other paths except the main input path in communication; The first detection module is used to detect input parameters of the main input path; The control module is used to send a first control signal to the first detection module and the second detection module after determining that the input state of the current power management system is abnormal according to the input parameters of the main input path; The first detection module is further used to cut off the switch component corresponding to the main input path according to the first control signal; The second detection module is used to turn on the switch component corresponding to any path except the main input path according to the first control signal.

4. The power management system according to claim 1, characterized in that: The first switching unit includes a first conversion component, the first conversion component includes a plurality of input terminals, each input terminal is connected to an output terminal of an input path, so as to convert an input voltage corresponding to each input path into a target voltage value; The output end of the first conversion component is connected to the input end of the control module.

5. The power management system according to claim 1, characterized in that: The first switching unit includes a second conversion component, a first OR logic gate, and a first diode, wherein an input end of the second conversion component is connected to an output end of the main input path to convert an input voltage of the main input path into a target voltage value; The first OR logic gate includes multiple input terminals; the output terminal of the second conversion component and the output terminal of any other path except the main input path are respectively connected to an input terminal of the first OR logic gate; the output terminal of the first OR logic gate is connected to the first terminal of the first diode; the second terminal of the first diode is connected to the input terminal of the control module.

6. The power management system according to claim 1, characterized in that: The power switching module further includes a second switching unit, the input end of the second switching unit is respectively connected to the output end of each input path, and the output end of the second switching unit is connected to the power input end of the driving module; wherein, The second switching unit is used to adjust the supply voltage of the driving module according to the input state of the current power management system.

7. The power management system according to claim 6, characterized in that: The second switching unit includes a second OR logic gate and a first inductor. The second OR logic gate includes multiple input terminals, each of which is connected to an output terminal of an input path. The output terminal of the second OR logic gate is connected to a first terminal of the first inductor, and a second terminal of the first inductor is connected to a power input terminal of the driving module.

8. The power management system according to claim 2, characterized in that: The power management system further comprises a pre-charging circuit, wherein the pre-charging circuit is connected to the output end of the main input path; The control module is further used to obtain the charging state of the pre-charging circuit; and determine whether the charging state is completed. If completed, a second control instruction is sent to the switch component corresponding to the main input path to turn on the main input path.

9. A control method for a power management system, characterized in that: A control module applied to the power management system, wherein the power management system further comprises a power switching module and a driving module; the power switching module comprises at least two input paths, each of which is used to receive a different input voltage; wherein the at least two input paths comprise a main input path; and the control method comprises: Obtaining input parameters of the main input path; Whether the input state of the current power management system is abnormal is determined based on the input parameters of the main input path. If abnormal, a control signal is sent to the power switching module to cut off the main input path and turn on any other path except the main input path.

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